Original articles (peer-reviewed)

•   Weiss A, Inoue-Murayama M, King JE. , Adams MJames , Matsuzawa T
  All too human? Chimpanzee and orang-utan personalities are not anthropomorphic projections
  Animal Behaviour,
•   Hockings KJ. , Humle T, Carvalho S, Matsuzawa T
  Chimpanzee interactions with nonhuman species in an anthropogenic habitat
  Behaviour,
• Bril B, Smaers J, Steele J, Rein R, Nonaka T, Dietrich G, Biryukova E, Hirata S, Roux V
  Functional mastery of percussive technology in nut-cracking and stone-flaking actions: experimental comparison and implications for the evolution of the human brain.
  The Philosophical Transactions of the Royal Society B: Biological Sciences, 367, 59-74.
•   Carvalho S, Biro D, Cunha E, Hockings KJ. , McGrew WC. , Richmond BG. , Matsuzawa T
  Chimpanzee carrying behaviour and the origins of human bipedality
  Current Biology, Volume 22, Issue 6, R180-R181
• Goto K, Imura T, Tomonaga M
  Perception of Emergent Configurations in Humans (Homo sapiens) and Chimpanzees (Pan troglodytes).
  Journal of Experimental Psychology: Animal Behavior Processes, Vol 38(2), 125-138.
•   Hayashi M, Ohashi G, Ryu HJin
  Responses toward a trapped animal by wild bonobos at Wamba
  Animal Cognition,
•   Hockings KJ. , Anderson JR. , Matsuzawa T
  Socioecological adaptations by chimpanzees, Pan troglodytes verus, inhabiting an anthropogenically impacted habitat
  Animal Behaviour, Volume 83, Issue 3, March 2012, Pages 801-810
•   Hockings KJ. , McLennan MR.
  From Forest to Farm: Systematic Review of Cultivar Feeding by Chimpanzees – Management Implications for Wildlife in Anthropogenic Landscapes
  PLoS ONE, 7(4): e33391
• Kano F, Yamanashi Y, Tomonaga M
  Emotion as an intervening variable in understanding the cognitive and social complexity and well-being of chimpanzees.
  Psychologia, Vol. 55, No.1, 9-20
•   Koops K, McGrew WC. , Matsuzawa T, Knapp LA.
  Terrestrial Nest-Building by Wild Chimpanzees (Pan troglodytes): Implications for the Tree-to-Ground Sleep Transition in Early Hominins
  American Journal Of Physical Anthropology,
• Koops K, McGrew WC. , Vries Hde , Matsuzawa T
  Nest-Building by Chimpanzees (Pan troglodytes verus) at Seringbara, Nimba Mountains: Antipredation, Thermoregulation, and Antivector Hypotheses
  International Journal of Primatology, Volume 33, Number 2, 356-380
• Myowa-Yamakoshi M, Scola C, Hirata S
  Humans and chimpanzees attend differently to goal-directed actions.
  Nature Communications, 3: 693
•    Yamamoto S, Humle T, Tanaka M
  Chimpanzees' flexible targeted helping based on an understanding of conspecifics' goals
  Proceedings of the National Academy of Sciences, Published online before print February 6, 2012

• Hattori Y, Tomonaga M, Fujita K
  Chimpanzees (Pan troglodytes) show more understanding of human attentional states when they request food in the experimenters hand than on the table.
  Interaction Studies, 12, 418-429
•    Hirata S, Fuwa K, Sugama K, Kusunoki K, Takeshita H
  Mechanism of birth in chimpanzees: humans are not unique among primates
  Biology Letters, 23 October 2011 vol. 7 no. 5 686-688
•   Hirata S, Matsuda G, Ueno A, Fuwa K, Sugama K, Kusunoki K, Fukushima H, Hiraki K, Tomonaga M, Hasegawa T
  Event-related potentials in response to subjects' own names: A comparison between humans and a chimpanzee.
  Communicative & Integrative Biology, 4(3), 321-323.
•   Hong K, Weiss A, Morimura N, Udono T, Hayasaka I, Humle T, Murayama Y, Ito S, Inoue-Murayama M
  Polymorphism of the Tryptophan Hydroxylase 2 (TPH2) Gene Is Associated with Chimpanzee Neuroticism.
  PLoS ONE, 6(7): e22144
•   Humle T, Colin C, Laurans M, Raballand E
  Group Release of Sanctuary Chimpanzees (Pan troglodytes) in the Haut Niger National Park, Guinea, West Africa: Ranging Patterns and Lessons So Far
  International Journal of Primatology, Volume 32, Number 2, 456-473
• Inoue S, Matsuzawa T
  Correlation between menstrual cycle and cognitive performance in a chimpanzee (Pan troglodytes).
  Journal of Comparative Psychology, 125: 104-11
• Kaneko T, Tomonaga M
  The perception of self-agency in chimpanzees (Pan troglodytes).
  Proceedings of the Royal Society Series B, , 278, 3694-3702.
• Kano F, Hirata S, Call J, Tomonaga M
  The visual strategy specific to humans among hominids: A study using the gap-overlap paradigm
  Vision Research, 51.2348-2355
• Kano F, Tomonaga M
  Perceptual mechanism underlying gaze guidance in chimpanzees and humans.
  Animal Cognition, 14, 377-386.
• Kano F, Tomonaga M
  Species difference in the timing of gaze movement between chimpanzees and humans.
  Animal Cognition, 14, 879-892.
• Kawakami K, Kawakami F, Tomonaga M, Kishimoto T, Minami T, Takai-Kawakami K
  Origins of a theory of mind.
  Infant Behavior & Development, 34, 264-269
• Ludwig VU. , Adachi I, Matsuzawa T
  Visuoauditory mappings between high luminance and high pitch are shared by chimpanzees (Pan troglodytes) and humans.
  Proc Natl Acad Sci U S A., published ahead of print December 5, 2011
•   Martin CF , Biro D, Matsuzawa T
  Chimpanzees' use of conspecific cues in matching-to-sample tasks: public information use in a fully automated testing environment
  Animal Cognition, Volume 14, Number 6, 893-902
• Matsuno T, Tomonaga M
  Stream/bounce perception and the effect of depth cues in chimpanzees (Pan troglodytes).
  Attention, Perception, & Psychophysics., Volume 73, Number 5, 1532-1545
• Morimura N, Idani G, Matsuzawa T
  The first chimpanzee sanctuary in Japan: an attempt to care for the “surplus” of biomedical research
  American Journal of Primatology, Volume 73, Issue 3, pages 226-232
• Murai C, Tanaka M, Tomonaga M, Sakagami M
  Long-term visual recognition of familiar persons, peers, and places by young monkeys (Macaca fuscata).
  Developmental Psychobiology, Volume 53, Issue 7, pages 732-737
•   Ogura T
  Contrafreeloading and the value of control over visual stimuli in Japanese macaques (Macaca fuscata)
  Animal Cognition, 14, 427-431
•   Ohashi G, Matsuzawa T
  Deactivation of snares by wild chimpanzees.
  Primates, 52, 1-5
• Saito A, Hayashi M, Ueno A, Takeshita H
  Orientation-indifferent representation in children's drawings
  Japanese Psychological Research, Volume 53, Number 4, 1 November 2011 , pp. 379-390(12)
• Sakai T, Mikami A, Tomonaga M, Matsui M, Suzuki J, Hamada Y, Tanaka M, Miyabe-Nishiwaki T, Makishima H, Nakatsukasa M, Matsuzawa T
  Differential prefrontal white matter development in chimpanzees and humans.
  Current Biology, 21, 1397-1402
• Sugawara T, Go Y, Udono T, Morimura N, Tomonaga M, Hirai H, Imai H
  Diversification of bitter taste receptor gene family in western chimpanzees
  Molecular Biology and Evolution, 28 (2) 921-931
•   Sugiyama Y, Humle T
  A Wild Chimpanzee Uses a Stick to Disable a Snare at Bossou, Guinea
  Pan Africa News, 18(1): 3-4
•   Tsutsumi S, Ushitani T, Tomonaga M, Fujita K
  Infant monkeys' concept of animacy: the role of eyes and fluffiness
  Primates, Volume 53, Number 2, 113-119
• Yamanashi Y, Hayashi M
  Assessing the effects of cognitive experiments on the welfare of captive chimpanzees (Pan troglodytes) by direct comparison of activity budget between wild and captive chimpanzees
  American Journal of Primatology, 73, 1231-1238

• Anderson JR. , Kuroshima H, Hattori Y, Fujita K
  Flexibility in the use of requesting gestures in squirrel monkeys (Saimiri sciureus).
  American Journal of Primatology, 72, 707-714
•   Biro D, Humle T, Koops K, Sousa C, Hayashi M, Matsuzawa T
  Chimpanzee mothers at Bossou, Guinea carry the mummified remains of their dead infants.
  Current Biology, Volume 20, Issue 8, R351-R352
•   Carvalho S, Yamanashi Y, Yamakoshi G, Matsuzawa T
  Bird in the hand: Bossou chimpanzees (Pan troglodytes) capture West African wood-owls (Ciccaba woodfordi) but not to eat
  Pan Africa News, 17(1), 6-9
• Fujisawa M, Matsubayashi K, Soumah AGaspard , Kasahara Y, Nakatsuka M, Matsuzawa T
  Farsightedness (presbyopia) in a wild elderly chimpanzee: The first report
  Geriatrics & Gerontology International, Volume 10, Issue 1, pages 113-114
•   Fukushima H, Hirata S, Ueno A, Matsuda G, Fuwa K, Sugama K, Kusunoki K, Hirai M, Hiraki K, Tomonaga M, Hasegawa T
  Neural correlates of face and object perception in an awake chimpanzee (Pan troglodytes) examined by scalp-surface event-related potentials.
  PLoS ONE, 5(10), e13366.
• Hattori Y, Kano F, Tomonaga M
  Differential sensitivity to conspecific and allospecific social cues in chimpanzees (Pan troglodytes) and humans (Homo sapiens)
  Biology Letters., 6, 610-613
• Hattori Y, Kuroshima H, Fujita K
  Tufted capuchin monkeys (Cebus apella) show understanding of human attentional states when requesting food held by a human.
  Animal Cognition, 13: 87-92
•   Hirata S, Fuwa K, Sugama K, Kusunoki K, Fujita S
  Facial perception of conspecifics: chimpanzees (Pan troglodytes) attend to proper orientation and open eyes.
  Animal Cognition, 13:679-688
•   Hirata S, Yamamoto S, Takemoto H, Matsuzawa T
  A Case Report of Meat and Fruit Sharing in a Pair of Wild Bonobos
  Pan Africa News, 17(2), December 2010 21-23
•   Hockings KJ. , Anderson JR. , Matsuzawa T
  Flexible feeding on cultivated underground storage organs by rainforest-dwelling chimpanzees at Bossou, West Africa.
  Journal of Human Evolution, 58, 227-233
•   Hockings KJ. , Yamakoshi G, Kabasawa A, Matsuzawa T
  Attacks on local persons by chimpanzees in Bossou, Republic of Guinea: long-term perspectives
  American Journal of Primatology, 72:887-896
• Kano F, Tomonaga M
  Attention to emotional scenes including whole-body expressions in chimpanzees (Pan troglodytes).
  Journal of Comparative Psychology, 124(3), 287-294.
• Kano F, Tomonaga M
  Face scanning in chimpanzees and humans: Continuity and discontinuity.
  Animal Behaviour, 79, 227-235
•   Koops K, McGrew WC. , Matsuzawa T
  Do chimpanzees (Pan troglodytes) use cleavers and anvils to fracture Treculia africana fruits? Preliminary data on a new form of percussive technology.
  Primates, 51, 175-178.
• Miyabe-Nishiwaki T, Kaneko A, Nishiwaki K, Watanabe A, Watanabe S, Maeda N, Kumazaki K, Morimoto M, Hirokawa R, Suzuki J, Ito Y, Hayashi M, Tanaka M, Tomonaga M, Matsuzawa T
  Tetraparesis resembling acute transverse myelitis in a captive chimpanzee (Pan troglodytes): long-term care and recovery
  Journal of Medical Primatology, 39, 336-346.
• Morimura N, Mori Y
  Effects of early rearing conditions on problem-solving skill in captive male chimpanzees (Pan troglodytes).
  American Journal of Primatology, Volume 72, Issue 7, pages 626-633
•   Paxton R, Basile BM. , Adachi I, Suzuki WA. , Wilson ME. , R. aRobert
  Rhesus monkeys (Macaca mulatta) rapidly learn to select dominant individuals in videos of artificial social interactions between unfamiliar conspecifics.
  Journal of Comparative Psychology, 124(4): 395-401
•   Sakai T, Hirai D, Mikami A, Suzuki J, Hamada Y, Tomonaga M, Tanaka M, Miyabe-Nishiwaki T, Makishima H, Nakatsukasa M, Matsuzawa T
  Prolonged maturation of prefrontal white matter in chimpanzees
  Nature Precedings, 4411.1.
•   Shirai N, Imura T, Hattori Y, Adachi I, Ichihara S, Kanazawa S, Yamaguchi MK. , Tomonaga M
  Asymmetric perception of radial expansion/contraction in Japanese macaque (Macaca fuscata) infants
  Experimental Brain Research, 202, 319-325
•   Tanaka M, Uchikoshi M
  Visual preference in a human-reared agile gibbon (Hylobates agilis)
  Primates, Volume 51, Number 1, 63-67
•   Tomonaga M, Imura T
  Pacman in the sky with shadows: The effect of cast shadows on the perceptual completion of occluded figures by chimpanzees and humans.
  Behavioral and Brain Functions, 6, 38
•   Tomonaga M, Imura T
  Visual search for human gaze direction by a chimpanzee (Pan troglodytes).
  PLoS ONE, 5(2): e9131
•   Tomonaga M, Uwano Y, Ogura S, Saito T
  Bottlenose dolphins' (Tursiopstruncatus) theory of mind as demonstrated by responses to their trainers' attentional states
  International Journal of Comparative Psychology, 23, 386-400
• Ueno A, Hirata S, Fuwa K, Sugama K, Kusunoki K, Matsuda G, Fukushima H, Hiraki K, Tomonaga M, Hasegawa T
  Brain activity in an awake chimpanzee in response to the sound of her own name
  Biology Letters, 6, 311-313
• Ushitani T, Imura T, Tomonaga M
  Object-based attention in chimpanzees (Pan troglodytes).
  Vision Research, 50, 577-584
•   Yamamoto S, Tanaka M
  The influence of kin relationship and reciprocal context on chimpanzees' other-regarding preferences.
  Animal Behaviour, Volume 79, Issue 3, Pages 595-602
• Yamanashi Y, Matsuzawa T
  Emotional consequences when chimpanzees (Pan troglodytes) face challenges: individual differences in self-directed behaviours during cognitive tasks
  Animal Welfare, 19, 25-30

• Adachi I
  Cross-modal representation in primates and dogs: A new framework of recognition of social objects.
  Interaction Studies, 10, 225-251
•   Adachi I, Chou DP. , Hampton RR.
  Thatcher Effect in Monkeys Demonstrates Conservation of Face Perception across Primates
  Current Biology, Volume 19, Issue 15, 1270-1273
• Adachi I, Kuwahata H, Fujita K, Tomonaga M, Matsuzawa T
  Plasticity of ability to form cross-modal representations in infant Japanese macaques.
  Developmental Science, 12, 446-452
•   Bril B, Dietrich G, Foucart J, Fuwa K, Hirata S
  Tool use as a way to assess cognition: how do captive chimpanzees handle the weight of the hammer when cracking a nut?
  Animal Cognition, 12, 217-235
• Carvalho S, Biro D, McGrew WC. , Matsuzawa T
  Tool-composite reuse in wild chimpanzees (Pan troglodytes): Archaeologically invisible steps in the technological evolution of early hominins?
  Animal Cognition, 12, S103-S114
• Crast J, Fragaszy D, Hayashi M, Matsuzawa T
  Dynamic in-hand movements in adult and young juvenile chimpanzees (Pan troglodytes).
  American Journal of Physical Anthropology, Volume 138, Issue 3, pages 274-285
• Hayashi M, Sekine S, Tanaka M, Takeshita H
  Copying a model stack of colored blocks by chimpanzees and humans.
  Interaction Studies, 10, 130-149.
• Hayashi M, Takeshita H
  Stacking of irregularly shaped blocks in chimpanzees (Pan troglodytes) and young humans (Homo sapiens).
  Animal Cognition, 12, S49-S58.
•   Hirata S, Morimura N, Houki C
  How to crack nuts: acquisition process in captive chimpanzees (Pan troglodytes) observing a model.
  Animal Cognition, 12, S87-S101
• Hockings KJ.
  Living at the interface: Human- chimpanzee competition, coexistence and conflict in Africa.
  Interaction Studies, 10, 183-205
•   Hockings KJ. , Anderson JR. , Matsuzawa T
  Use of Wild and Cultivated Foods by Chimpanzees at Bossou, Republic of Guinea: Feeding Dynamics in a Human-Influenced Environment
  American Journal of Primatology, 71:636-646
•   Hockings KJ. , Humle T
  Best practice guidelines for the prevention and mitigation of conflict between humans and great apes.
  IUCN/SSC Primate Specialist Group (PSG), Gland,
•   Humle T, Matsuzawa T
  Laterality in hand use across four tool-use behaviors among the wild chimpanzees of Bossou, Guinea, West Africa.
  American Journal of Primatology, 70, 40-48.
•   Humle T, Snowdon CT. , Matsuzawa T
  Social influences on ant-dipping acquisition in the wild chimpanzees (Pan troglodytes verus) of Bossou, Guinea, West Africa.
  Animal Cognition, 12, S37-S48.
• Imura T, Tomonaga M
  Moving shadows contribute to the corridor illusion in a chimpanzee (Pan troglodytes).
  Journal of Comparative Psychology, 123, 280-286.
• Inoue S, Matsuzawa T
  Acquisition and memory of sequence order in young and adult chimpanzees (Pan troglodytes).
  Animal Cognition, 12, S59-S69.
• Kano F, Tomonaga M
  How chimpanzees look at pictures: A comparative eye-tracking study.
  Proceedings of the Royal Society Series B, 276, 1949-1955.
•   Kawakami F, Kawakami K, Tomonaga M, Takai-Kawakami K
  Can we observe spontaneous smiles in 1-year-olds?
  Infant Behavior and Development, 32(4): 416-421
•   Martinez L, Matsuzawa T
  Effect of species-specificity in auditory-visual intermodal matching in a chimpanzee (Pan troglodytes) and humans
  Behavioural Processes, 82, 160-163
• Martinez L, Matsuzawa T
  Visual and auditory conditional position discrimination in chimpanzees (Pan troglodytes).
  Behavioural Processes, 82, 90-94.
• Martinez L, Matsuzawa T
  Auditory-visual intermodal matching based on individual recognition in a chimpanzee (Pan troglodytes)
  Animal Cognition, 12, S71-S85
•   Matsuzawa T
  Symbolic representation of number in chimpanzees
  Current Opinion in Neurobiology, 19:92-98
•   Matsuzawa T
  The chimpanzee mind: in search of the evolutionary roots of the human mind
  Animal Cognition, 12, S1-S9
•   Murai C, Tomonaga M
  Fear responses of Japanese monkeys to scale models.
  Journal of Ethology, 27, 1-10
•   Nakato E, Otsuka Y, Konuma H, Kanazawa S, Yamaguchi MK. , Tomonaga M
  Perception of illusory shift of eye gaze direction by infants
  Infant Behavior and Development, 32, 422-428
•   Ogura T, Ueno Y
  A case study of development of a captive gorilla infant in the zoo: relationship with the mother and a nonkin female
  The Japanese Journal of Animal Psychology, 59, 1 169-175
• Potì P, Hayashi M, Matsuzawa T
  Spatial construction skills of chimpanzees (Pan troglodytes) and young human children (Homo sapiens sapiens).
  Developmental Science, Volume 12, Issue 4, 536-548
•   Shimada MK. , Hayakawa S, Fujita S, Sugiyama Y, Saitou N
  Skewed Matrilineal Genetic Composition in a Small Wild Chimpanzee Community
  Folia Primatologica, 80:19-32
•   Tanaka M, Yamamoto S
  Token transfer between mother and offspring chimpanzees (Pan troglodytes): mother–offspring interaction in a competitive situation
  Animal Cognition, Volume 12, Supplement 1
• Tomonaga M, Imura T
  Human gestures trigger different attentional shifts in chimpanzees (Pan troglodytes) and humans (Homo sapiens).
  Animal Cognition, 12, S11-S18.
•   Tomonaga M, Imura T
  Faces capture the visuospatial attention of chimpanzees (Pan troglodytes): Evidence from a cueing experiment.
  Frontiers in Zoology, 6:14
•   Weiss A, Inoue-Murayama M, Hong K, Inoue E, Udono T, Ochiai T, Matsuzawa T, Hirata S, King JE.
  Assessing chimpanzee personality and subjective well-being in Japan.
  American Journal of Primatology, 71, 283-292
•   Yamamoto S, Humle T, Tanaka M
  Chimpanzees help each other upon request
  PLoS ONE, 4 (10): e7416
•   Yamamoto S, Tanaka M
  How did altruism and reciprocity evolve in humans? Perspectives from experiments on chimpanzees (Pan troglodytes)
  Interaction Studies, 10 (2), 150-182
•   Yamamoto S, Tanaka M
  Selfish strategies develop in social problem situations in chimpanzee (Pan troglodytes) mother-infant pairs
  Animal Cognition, 12, S27-S36
• Yamamoto S, Tanaka M
  Do chimpanzees (Pan troglodytes) spontaneously take turns in a reciprocal cooperation task?
  Journal of Comparative Psychology, Vol 123(3) 242-249

• Anderson JR. , Hattori Y, Fujita K
  Quality before quantity: rapid learning of reverse-reward contingency by capuchin monkeys (Cebus apella)
  Journal of Comparative Psychology, 122(4), 445-448
• Carvalho S, Cunha E, Sousa C, Matsuzawa T
  Chaînes opératoires and resource-exploitation strategies in chimpanzee (Pan troglodytes) nut cracking.
  Journal of Human Evolution, 55, 148-163
•   Imura T, Shirai N, Tomonaga M, Yamaguchi MK. , Yagi A
  Asymmetry on the perception of motion in depth by moving cast shadows.
  Journal of Vision, 8, 1-8
• Imura T, Tomonaga M, Yagi A
  The effects of linear perspective on relative size discrimination in chimpanzees (Pan troglodytes) and humans (Homo sapiens).
  Behavioural Processes, 77, 306-312
• Imura T, Tomonaga M, Yamaguchi MK. , Yagi A
  Asymmetry in the detection of shapes from shading in infants
  Japanese Psychological Research, 50, 128-136
• Imura T, Yamaguchi MK. , Kanazawa S, Shirai N, Otsuka Y, Tomonaga M, Yagi A
  Infants' sensitivity to shading and line junctions.
  Vision Research, 48, 1420-1426
• Kaneko T, Tomonaga M
  Utility of habituation-dishabituation procedure for comparative cognitive studies of Callithrix jacchus and Aotus spp.: Preliminary assessments.
  Perceptual and Motor Skills, 106(3):830-832
• Kano F, Tanaka M, Tomonaga M
  Enhanced recognition of emotional stimuli in the chimpanzee (Pan troglodytes).
  Animal Cognition, 11, 517-524
•   Kawakami K, Takai-Kawakami K, Kawakami F, Tomonaga M, Suzuki M, Shimizu Y
  Roots of smile: A preterm neonates' study.
  Infant Behavior and Developme, 31:518-522
• Matsuno T, Tomonaga M
  Temporal characteristics of visibility in chimpanzees (Pan troglodytes) and humans (Homo sapiens) assessed using a visual masking paradigm.
  Perception, 37, 1258-1268
•   Möbius Y, Boesch C, Koops K, Matsuzawa T, Humle T
  Cultural differences in army ant predation by West African chimpanzees? A comparative study of microecological variables
  Animal Behaviour, 76, 37-45
• Okamoto-Barth S, Tomonaga M, Tanaka M, Matsuzawa T
  Development of using experimenter-given cues in infant chimpanzees: Longitudinal changes in behavior and cognitive development.
  Developmental Science, 11(1), 98-108.
• Tomonaga M
  Relative numerosity discrimination by chimpanzees (Pan troglodytes): Evidence for approximate numerical representations
  Animal Cognition, 11, 43-57.
•   Ueno A, Hirata S, Fuwa K, Sugama K, Kusunoki K, Matsuda G, Fukushima H, Hiraki K, Tomonaga M, Hasegawa T
  Auditory ERPs to Stimulus Deviance in an Awake Chimpanzee (Pan troglodytes): Towards Hominid Cognitive Neurosciences
  PLoS ONE, 3(1): e1442
•   Yamamoto S, Yamakoshi G, Humle T, Matsuzawa T
  Invention and modification of a new tool use behavior: Ant-fishing in trees by a wild chimpanzee (Pan troglodytes verus) at Bossou, Guinea.
  American Journal of Primatology, 70, 699-702.

•   Carvalho S, Sousa C, Matsuzawa T
  New Nut-Cracking Sites in Diecké Forest, Guinea: An Overview of the Surveys
  Pan Africa News, 14 (1), 11-13
•   Granier N, Marie-Claude H, Matsuzawa T
  Preliminary surveys of chimpanzees in Gouéla area and Déré Forest, the Nimba Mountain Biosphere Reserve, Republic of Guinea
  Pan Africa News, 14(2), 20-22
• Hayashi M
  Stacking blocks by chimpanzees: developmental processes and physical understanding.
  Animal Cognition, 10, 89-103.
• Hayashi M
  A new notation system of object manipulation in the nesting-cup task for chimpanzees and humans.
  Cortex, 43, 308-318.
•   Hirata S
  A note on the responses of chimpanzees (Pan troglodytes) to live self-images on television monitors.
  Behavioral Processes, 75, 85-90
•   Hirata S, Fuwa K
  Chimpanzees (Pan troglodytes) learn to act with other individuals in a cooperative task
  Primates, 48, 13-21
•   Hirata S, Tashiro Y
  Bonobos at the “Lola Ya Bonobo" Sanctuary in the Democratic Republic of the Congo
  Pan Africa News, 14(1), June, 2007 6-8
•   Hockings KJ.
  Human-chimpanzee coexistence at Bossou, the Republic of Guinea: a chimpanzee perspective.
  PhD Thesis, University of Stirling, Stirling,
•   Hockings KJ. , Humle T, Anderson JR. , Biro D, Sousa C, Ohashi G, Matsuzawa T
  Chimpanzees share forbidden fruit.
  PLoS ONE, Issue 9, 1-4.
•    Inoue S, Matsuzawa T
  Working memory of numerals in chimpanzees.
  Current Biology, Volume 17, Issue 23, R1004-R1005
•   Kawakami K, Takai-Kawakami K, Tomonaga M, Suzuki J, Kusaka F, Okai T
  Spontaneous smile and spontaneous laugh: An intensive longitudinal case study
  Infant Behavior and Development, 30, 151-157
•   Koops K, Humle T, Sterck E, Matsuzawa T
  Ground-nesting by the chimpanzees of the Nimba Mountains, Guinea: Environmentally or socially determined?
  American Journal of Primatology, 69, 407-419
•   Matsuno T, Tomonaga M
  An advantage for concavities in shape perception by chimpanzees (Pan troglodytes)
  Behavioural Processes, 75, 253-258
•   Matsuzawa T
  Assessment of the planted trees in Green Corridor Project
  Pan Africa News, 14(2), 27-29
• Matsuzawa T
  Comparative cognitive development.
  Developmental Science, 10, 97-103
• Morimura N
  Note on effects of a daylong feeding enrichment program for Chimpanzees (Pan troglodytes)
  Applied Animal Behaviour Science, Volume 106, Issue 1 , Pages 178-183
•   Nishimura T, Mikami A, Suzuki J, Matsuzawa T
  Development of the Laryngeal Air Sac in Chimpanzees
  International Journal of Primatology, Volume 28, Number 2, 483-492
• Okamoto-Barth S, Tanaka M, Kawai N, Tomonaga M
  Looking compensates for the distance between mother and infant chimpanzee.
  Developmental Science, 10, 172-182.
•   Tanaka M
  Development of visual preference of chimpanzees (Pan troglodytes) for photographs of primates: effect of social experience
  Primates, Volume 48, Number 4, 303-309
•   Tanaka M
  Recognition of pictorial representations by chimpanzees (Pan troglodytes)
  Animal Cognition, Volume 10, Number 2, Pages 169-179
• Thompson ME. , Jones JH. , Pusey AE. , Marsden SBrewer , Goodall J, Marsden D, Matsuzawa T, Nishida T, Reynolds V, Sugiyama Y, Wrangham RW.
  Aging and fertility patterns in wild chimpanzees provide insights into the evolution of menopause.
  Current Biology, 17, 2150-2156
• Tomonaga M
  Is chimpanzee (Pan troglodytes) spatial attention reflexively triggered by the gaze cue?
  Journal of Comparative Psychology, 121, 156-170.
• Tomonaga M
  Visual search for orientation of faces by a chimpanzee (Pan troglodytes): Face-specific upright superiority and the role of configural properties of faces.
  Primates, 48, 1-12.
• Tomonaga M, Imura T, Mizuno Y, Tanaka M
  Gravity bias in young and adult chimpanzees (Pan troglodytes): Tests with modified opaque-tubes task.
  Developmental Science, 10, 411-421
•   Uenishi G, Fujita S, Ohashi G, Kato A, Yamauchi S, Matsuzawa T, Ushida K
  Molecular analysis of the intestinal microbiota of chimpanzees in the wild and in captivity.
  American journal of Primatology, 69: 1-10
• Uenishi G, Fujita S, Ohashi G, Kato A, Yamauchi S, Matsuzawa T, Ushida K
  Molecular analyses of the intestinal microbiota of chimpanzees in the wild and in captivity.
  American journal of Primatology, 69: 367-376

•   Adachi I, Kuwahata H, Fujita K, Tomonaga M, Matsuzawa T
  Japanese macaques form a cross-modal representation of their own species in their first year of life
  Primates, 47, 350-354
• Celli ML. , Tomonaga M, Udono T, Teramoto M, Nagano K
  Spontaneous object sharing in captive chimpanzees (Pan troglodytes).
  International Journal of Comparative Psychology, 19, 439-446
•   Hockings KJ. , Anderson JR. , Matsuzawa T
  Road crossing in chimpanzees: a risky business.
  Current Biology, Vol 16 No 17, 668-670
•   Imura T, Yamaguchi MK. , Kanazawa S, Shirai N, Otsuka Y, Tomonaga M, Yagi A
  Perception of motion trajectory of object from the moving cast shadow in infants
  Vision Research, 46, 652-657
•   Kawakami K, Takai-Kawakami K, Tomonaga M, Suzuki J, Kusaka T, Okai T
  Origins of smile and laughter: A preliminary study
  Early Human Development, 82, 61-66
•   Koops K, Matsuzawa T
  Hand Clapping by a Chimpanzee in the Nimba Mountains, Guinea, West Africa
  Pan Africa News, 13(2)19-21
•   Matsuno T, Tomonaga M
  Visual search for moving and stationary items in chimpanzees (Pan troglodytes) and humans (Homo sapiens)
  Behavioural Brain Research, 172, 219-232
•   Matsuzawa T
  Bossou 30 years
  Pan Africa News, 13, 16-18
•   Mizuno Y, Takeshita H, Matsuzawa T
  Behavior of infant chimpanzees during the night in the first 4 months of life: smiling and suckling in relation to behavioral state.
  Infancy, 9(2): 215-234
•   Nishimura T, Mikami A, Suzuki J, Matsuzawa T
  Descent of the hyoid in chimpanzees: evolution of facial flattening and speech.
  Journal of Human Evolution, 51(3): 244-254
•   Ohashi G
  Bossou Chimpanzees Crossed the National Border of Guinea into Liberia
  Pan Africa News, 13(1):10-12
•   Ushida K, Fujita S, Ohashi G
  Nutritional Significance of the Selective Ingestion of Albizia zygia Gum Exudate by Wild Chimpanzees in Bossou, Guinea
  American Journal of Primatology, 68:143-151

• Bard KA. , Myowa-Yamakoshi M, Tomonaga M, Tanaka M, Costall A, Matsuzawa T
  Group differences in the mutual gaze of chimpanzees (Pan troglodytes).
  Developmental Psychology, 41: 616-624
•   Hayashi M, Mizuno Y, Matsuzawa T
  How does stone-tool use emerge? Introduction of stones and nuts to naive chimpanzees in captivity.
  Primates, 46(2): 91-102.
•   Matsumoto-Oda A, Tomonaga M
  “Intentional” control of sound production found in leaf-clipping display of Mahale chimpanzees
  Journal of Ethology, Volume 23, Number 2, 109-112
•   Matsumoto-Oda A, Tomonaga M
  "Intentional" control of sound production found in leaf-clipping display of Mahale chimpanzees
  Journal of Ethology, 23: 109-112
•   Murai C, Kosugi D, Tomonaga M, Tanaka M, Matsuzawa T, Itakura S
  Can chimpanzee infants (Pan troglodytes) form categorical representations in the same manner as human infants(Homo sapiens)?
  Developmental Science, 8:3, pp 240-254
•   Myowa-Yamakoshi M, Yamaguchi MK. , Tomonaga M, Tanaka M, Matsuzawa T
  Development of face recognition in infant chimpanzees (Pan troglodytes)
  Cognitive Development , 20, 49-63
•   Takemoto H, Hirata S, Sugiyama Y
  The formation of the brush-sticks: modification of chimpanzees or the by-product of folding?
  Primates, 46, 183-190
•   Takeshita H, Fragaszy D, Mizuno Y, Matsuzawa T, Tomonaga M, Tanaka M
  Exploring by doing: How young chimpanzees discover surfaces through actions with objects
  Infant Behavior & Development, 28, 316-328
•   Ueno A, Matsuzawa T
  Response to novel food in infant chimpanzees: Do infants refer to mothers before ingesting food on their own?
  Behavioural Processes, 68(1):85-90

•   Anderson JR. , Myowa-Yamakoshi M, Matsuzawa T
  Contagious yawning in chimpanzees
  Proc Biol Sci., 271(Suppl 6): S468-S470
•   Biro D, Inoue-Nakamura N, Tonooka R, Yamakoshi G, Sousa C, Matsuzawa T
  Cultural innovation and transmission of tool use in wild chimpanzees: evidence from field experiments
  Animal Cognition, Volume 6, Number 4, 213-223
• Celli ML. , Hirata S, Tomonaga M
  Socioecological influences on tool use in captive chimpanzees.
  International Journal of Primatology, 25, 1267-1281
• Granier N, Martinez L
  Première reconnaissance des chimpanzés Pan troglodytes verus dans la zone transfrontalière entre la Guinée et le Mali (Afrique de l’Ouest).
  Primatologie, 6:423–447
•   Huffman MA. , Hirata S
  An experimental study of leaf swallowing in captive chimpanzees: insights into the origin of a self-medicative behavior and the role of social learning
  Primates, 45, 113-118.
•   Humle T, Matsuzawa T
  Oil Palm Use by Adjacent Communities of Chimpanzees at Bossou and Nimba Mountains, West Africa
  International Journal of Primatology, Vol. 25, No. 3, 551-581
• Humle T, Matsuzawa T, Yamakoshi G
  Chimpanzee conservation and environmental education in Bossou and Nimba, Guinea, West Africa.
  Folia Primatologica, 75(S1):280-281
•   Kawai N, Morokuma S, Tomonaga M, Horimoto N, Tanaka M
  Associative Learning and Memory in a Chimpanzee Fetus: Learning and Long-Lasting Memory Before Birth
  Developmental Psychobiology, Volume 44, Issue 2, pages 116-122
•   Kuwahata H, Adachi I, Fujita K, Tomonaga M, Matsuzawa T
  Development of schematic face preference in macaque monkeys
  Behavioural Processes, 66, 17-21
•   Matsuno T, Kawai N, Matsuzawa T
  Color classification by chimpanzees (Pan troglodytes) in a matching-to-sample task
  Behavioural Brain Research, 148, 157-165
•   Morokuma S, Fukushima K, Kawai N, Tomonaga M, Satoh S, Nakano H
  Fetal habituation correlates with functional brain development
  Behavioural Brain Research, 153, 459-463
•   Murai C, Tomonaga M, Kamegai K, Terazawa N, Yamaguchi MK.
  Do infant Japanese macaques (Macaca fuscata) categorize objects without specific training?
  Primates, 45:1-6
•   Myowa-Yamakoshi M, Tomonaga M, Tanaka M, Matsuzawa T
  Imitation in neonatal chimpanzees (Pan troglodytes)
  Developmental Science, 7:4, pp 437-442
•   Okamoto S, Tanaka M, Tomonaga M
  Looking back: The “representational mechanism”of joint attention in an infant chimpanzee (Pan troglodytes)
  Japanese Psychological Research, Volume 46, No. 3, 236-245
•   Shimada MK. , Hayakawa S, Humle T, Fujita S, Hirata S, Sugiyama Y, Saitou N
  Mitochondrial DNA Genealogy of Chimpanzees in the Nimba Mountains and Bossou, West Africa
  American Journal of Primatology, 64, 261-275
•   Sugiyama Y
  Demographic Parameters and Life History of Chimpanzees at Bossou, Guinea
  American Journal Of Physical Anthropology, 124:154-165
•   Takemoto H
  Seasonal change in terrestriality of chimpanzees in relation to microclimate in the tropical forest.
  American Journal of Physical Anthropology, 124: 81-92
•   Tomonaga M, Tanaka M, Matsuzawa T, Myowa-Yamakoshi M, Kosugi D, Mizuno Y, Okamoto S, Yamaguchi MK. , Bard KA.
  Development of social cognition in infant chimpanzees (Pan troglodytes): Face recognition, smiling, gaze, and the lack of triadic interactions
  Japanese Psychological Research, Volume 46, Issue 3, pages 227-235
•   Ueno A, Matsuzawa T
  Food transfer between chimpanzee mothers and their infants
  Primates, 45:231-239
•   Ueno A, Ueno Y, Tomonaga M
  Facial responses to four basic tastes in newborn rhesus macaques (Macaca mulatta) and chimpanzees (Pan troglodytes)
  Behavioural Brain Research, 154, 261-271
•   Yamakoshi G
  Food Seasonality and Socioecology in Pan: Are West African Chimpanzees Another Bonobo?
  African Study Monographs, 25, 45-60
•   Yamakoshi G, Myowa-Yamakoshi M
  New observations of ant-dipping techniques in wild chimpanzees at Bossou, Guinea.
  Primates, Volume 45, Number 1, 25-32
•   Zamma K, Fujita S
  Genito-genital rubbing among the chimpanzees of Mahale and Bossou
  Pan Africa News, 11(2): 5-8

•   Celli ML. , Tomonaga M, Udono T, Teramoto M, Nagano K
  Tool use tasks as environmental enrichment for captive chimpanzees
  Applied Animal Behaviour Science, 81: 171-182
•   Hayashi M, Matsuzawa T
  Cognitive development in object manipulation by infant chimpanzees.
  Animal Cognition, 6: 225-233
• Hirata S, Celli ML.
  Role of mothers in the acquisition of tool-use behaviours by captive infant chimpanzees.
  Animal Cognition, 6, 235-244
•   Humle T
  Culture and variation in wild chimpanzee behaviour: a study of three communities in West Africa.
  PhD Thesis, University of Stirling, Stirling,
•   Imura T, Tomonaga M
  Perception of depth from shading in infant chimpanzees (Pan troglodytes)
  Animal Cognition, Volume 6, Number 4, 253-258
•   Iversen IH. , Matsuzawa T
  Development of interception of moving targets by chimpanzees (Pan troglodytes) in an automated task
  Animal Cognition, 6 : 169-183
•   Matsuzawa T
  The Ai project: historical and ecological contexts
  Animal Cognition, 6(4): 199-211
•   Myowa-Yamakoshi M, Tomonaga M, Tanaka M, Matsuzawa T
  Preference for human direct gaze in infant chimpanzees (Pan troglodytes)
  Cognition, 89, B53-B64
•   Nakamura M, Ohashi G
  Eleven-Year Old Male Chimpanzee Outranks Ex-Alpha Adult Male at Bossou
  Pan Africa News, 10: 9-11
•   Nishimura T, Mikami A, Suzuki J, Matsuzawa T
  Descent of the larynx in chimpanzee infants
  PNAS, 100(12), 6930-6933
•   Shimizu K, Douke C, Fujita S, Matsuzawa T, Tomonaga M, Tanaka M, Matsubayashi K, Hayashi M
  Urinary steroids, FSH and CG measurements for monitoring the ovarian cycle and pregnancy in the chimpanzee
  Journal of Medical Primatology, Volume 32, Issue 1, pages 15-22
•   Sousa C, Okamoto S, Matsuzawa T
  Behavioural development in a matching-to-sample task and token use by an infant chimpanzee reared by his mother
  Animal Cognition, 6 : 259-267
•   Takemoto H
  Phytochemical Determination for Leaf Food Choice by Wild Chimpanzees in Guinea, Bossou
  Journal of Chemical Ecology, Volume 29, Number 11, 2551-2573
•   Tanaka M
  Visual preference by chimpanzees (Pan troglodytes) for photos of primates measured by a free choice-order task: implication for influence of social experience
  Primates, 44: 157-165
•   Tanaka M, Tomonaga M, Matsuzawa T
  Finger drawing by infant chimpanzees (Pan troglodytes)
  Animal Cognition, 6 : 245-251

•   Humle T, Matsuzawa T
  Ant-Dipping Among the Chimpanzees of Bossou, Guinea, and Some Comparisons With Other Sites
  American Journal of Primatology, 58:133-148
•   Kawakami K, Tomonaga M, Suzuki J
  The calming effect of stimuli presentation on infant Japanese macaques (Macaca fuscata) under stress situation: A preliminary study
  Primates, 43: 73-85
•   Matsumoto-Oda A, Oda R, Hayashi Y, Murakami H, Maeda N, Kumazaki K, Shimizu K, Matsuzawa T
  Vaginal Fatty Acids Produced by Chimpanzees during Menstrual Cycles
  Folia Primatologica, 74:75-79
•   Okamoto S, Tomonaga M, Ishii K, Kawai N, Tanaka M, Matsuzawa T
  An infant chimpanzee (Pan troglodytes) follows human gaze
  Animal Cognition, Volume 5, Number 2, 107-114
• Tomonaga M
  Attention visuelle et perception de regards par le chimpanzé (Pan troglodytes) et le babouin (Papio papio) [Visual attention and perception of gaze by the chimpanzee (Pan troglodytes) and the baboon (Papio papio).]
  Primatologie, 5, 49-73
•   Tomonaga M
  Action-based distractor effects on the manual response times of chimpanzees during discrimination tasks
  Cognitive Brain Research, 13, 235-240
• Tomonaga M
  Attentional capture in the chimpanzee (Pan troglodytes): Effects of a singleton distractor on visual search performances.
  Current Psychology Letters, No.8, 97-105
•   Tomonaga M, Matsuzawa T
  Enumeration of briefly presented items by the chimpanzee (Pan troglodytes) and humans (Homo sapiens)
  Animal Learning & Behavior, 30 (2), 143-157
•   Visalberghi E, Myowa-Yamakoshi M, Hirata S, Matsuzawa T
  Responses to Novel Foods in Captive Chimpanzees
  Zoo Biology, 21:539-548

•   Biro D, Matsuzawa T
  Use of numerical symbols by the chimpanzee (Pan troglodytes): Cardinals, ordinals, and the introduction of zero
  Animal Cognition, 4 :193-199
•   Celli ML. , Tomonaga M, Udono T, Teramoto M, Nagano K
  Learning processes in the acquisition of a tool using task by captive chimpanzees.
  Psychologia, 44: 70-81
•   Fagot J, Tomonaga M
  Effects of element separation on perceptual grouping by humans (Homo sapiens) and chimpanzees (Pan troglodytes): perception of Kanizsa illusory figures
  Animal Cognition, 4: 171-177
•   Hirata S, Matsuzawa T
  Tactics to obtain a hidden food item in chimpanzee pairs (Pan troglodytes).
  Animal Cognition, 4, 285-295.
•   Hirata S, Yamakoshi G, Fujita S, Ohashi G, Matsuzawa T
  Capturing and Toying with Hyraxes (Dendrohyrax dorsalis) by Wild Chimpanzees (Pan troglodytes) at Bossou, Guinea
  American Journal of Primatology, 53, 93-97
•   Humle T, Matsuzawa T
  Behavioural Diversity among the Wild Chimpanzee Populations of Bossou and Neighbouring Areas, Guinea and Côte d’Ivoire, West Africa
  Folia Primatologica, 72:57-68
•   Humle T, Matsuzawa T
  Behavioural Diversity among the Wild Chimpanzee Populations of Bossou and Neighbouring Areas, Guinea and Côte d’Ivoire, West Africa
  Folia Primatol, 72:57-68
•   Iversen IH. , Matsuzawa T
  Acquisition of navigation by chimpanzees (Pan troglodytes) in an automated fingermaze task
  Animal Cognition, 4 :179-192
•   Kawai N, Matsuzawa T
  “Magical number 5” in a chimpanzee
  Behavioral and Brain Sciences, 24: 127-128
• Morimura N, Matsuzawa T
  Memory of movies by chimpanzees (Pan troglodytes)
  Journal of Comparative Psychology, 115: 152-158
• Myowa-Yamakoshi M, Tomonaga M
  Perceiving eye gaze in an infant gibbon (Hylobates agilis).
  Psychologia, 44(1): 24-30
•   Myowa-Yamakoshi M, Tomonaga M
  Development of face recognition in an infant gibbon(Hylobates agilis)
  Infant Behavior & Development, 24:215-227
•   Sousa C, Matsuzawa T
  The use of tokens as rewards and tools by chimpanzees(Pan troglodytes)
  Animal Cognition, 4 :213-221
•   Tanaka M
  Discrimination and categorization of photographs of natural objects by chimpanzees (Pan troglodytes)
  Animal Cognition, 4 :201-211
• Tomonaga M
  Visual search for biological motion patterns in chimpanzees (Pan troglodytes).
  Psychologia, 44(1): 46-59
•   Tonooka R
  Leaf-folding behavior for drinking water by wild chimpanzees (Pan troglodytes verus) at Bossou, Guinea
  Animal Cognition, 4 :325-334

•   Hirata S, Morimura N
  Naive Chimpanzees' (Pan troglodytes) Observation of Experienced Conspecifics in a Tool-Using Task
  Journal of Comparative Psychology, Vol. 114, No. 3, 291-296
•   Kawai N, Matsuzawa T
  Numerical memory span in a chimpanzee
  Nature, Volume: 403, Issue: 6765, Pages: 39-40
•   Kawai N, Matsuzawa T
  A conventional approach to chimpanzee cognition. Response to M.D.Hauser (2000)
  Trends in Cognitive Sciences, 4(4):128-129
• Myowa-Yamakoshi M, Matsuzawa T
  Imitation of intentional manipulatory actions in chimpanzees (Pan troglodytes)
  Journal of Comparative Psychology, 114: 381-391
•   Nobuyuki K
  The number of trial upon the effects of US duration in conditioned licking suppression with rats
  Japanese Journal of Animal Psychology, 50: 21-26
•   Shimada MK.
  A Survey of the Nimba Mountains, West Africa from Three Routes: Confirmed New Habitat and Ant-Catching Wand Use of Chimpanzees
  Pan Africa News, 7(1): 7-10
•   Tomonaga M, Matsuzawa T
  Sequential responding to arabic numerals with wild cards by the chimpanzee (Pan troglodytes)
  Animal Cognition, 3 :1-11
• Tsuji K, Hayashibe K, Hara M, Matsuzawa T
  Visuo-motor development which causes detection of visual depth from motion and density cues
  Swiss Journal of Psychology, 59(2): 102-107

•   Humle T
  New Record of Fishing for Termites (Macrotermes) by the Chimpanzees of Bossou (Pan troglodytes verus), Guinea
  Pan Africa News, 6(1): 3-4

•   Hirata S, Morimura N, Matsuzawa T
  Green passage plan (tree-planting project) and environmental education using documentary videos at Bossou: a progress report.
  Pan Africa News, 5:18-20
•   Hirata S, Myowa M, Matsuzawa T
  Use of Leaves As Cushions to Sit on Wet Ground by Wild Chimpanzees
  American Journal of Primatology, 44:215-220 (1998)

Reviews

•   Haslam M, Hernandez-Aguilar A, Ling V, Carvalho S, Torre Ide-la , DeStefano A, Du A, Hardy B, Harris J, Marchant L, Matsuzawa T, McGrew W, Mercader J, Mora R, Petraglia M, Roche H, Visalberghi E, Warren R
  Primate archaeology
  Nature, 460, 339-344
•   Hirata S
  Chimpanzee social intelligence: selfishness, altruism, and the mother-infant bond
  Primates, 50:3-11
• Takeshita H, Myowa-Yamakoshi M, Hirata S
  The supine position of postnatal human infants: Implications for the development of cognitive intelligence.
  Interaction Studies, Volume 10, Number 2 pp. 252-268
•   Matsuzawa T
  Tetsuro Matsuzawa
  Current Biology, 19, R310–R312
•   Ohashi G, Hasegawa R, Makan K, Matsuzawa T
  Arbors and cuttings: New trials for Green Corridor Project at Bossou-Nimba
  Pan Africa News, 15(2): 20-23
•   Matsuzawa T, McGrew WC.
  Kinji Imanishi and 60 years of Japanese Primatology.
  Current Biology, 18(14), R587-R591
• Hirata S
  Competitive and cooperative aspects of social intelligence in chimpanzees.
  The Japanese Journal of Animal Psychology, 57, 29-40
•   Matsuzawa T
  Primate viewing
  Nature, 434, 21-22.
•   Tanaka M
  Dario Maestripieri (ed): Primate psychology Harvard University Press, Cambridge, 2003. 619 pp
  Primates, 46:75-76
•   Matsuzawa T, Tomonaga M
  For a rise of comparative cognitive science
  Animal Cognition, 4: 133-135