Matsuzawa, T. (1985) Use of numbers by a chimpanzee. Nature, 315, 57-59.

Matsuzawa, T. (1985) Color naming and classification in a chimpanzee (Pan troglodytes). Journal of Human Evolution, 14, 283-291.

Fujita, K. & Matsuzawa, T. (1986) A new procedure to study the perceptual world of animals with sensory reinforcement: Recognition of humans by a chimpanzee. Primates, 27, 283-291.

Matsuzawa, T., Asano, T., Kubota, K., & Murofushi, K. (1986) Acquisition and Generalization of numerical labeling by a chimpanzee. In D.M.Taub and F.A.,King (Eds.), "Current perspectives in primate social dynamics". Van Nostrand Reinhold: New York.

Matsuzawa, T. (1986) Spontaneous sorting in man and chimpanzee. Primate Report, 14, 180.

Matsuzawa, T. (1986) Pattern construction by a chimpanzee. Primate Report, 14, 225-226.

Wada, K. & Matsuzawa, T. (1986) A new approach to evaluating troop deployment in wild Japanese monkeys. International Journal of Primatology, 7(1), 1-16.

Hayashibe, K., Hara, M., Tsuji, K., & Matsuzawa, T. (1988) Japanese monkeys' cardiac responses to visual depth. Perceptual and Motor Skills, 67, 303-310.

Matsuzawa, T. (1989) Spontaneous pattern construction in a chimpanzee. In Heltne, P. and Marquardt, L. (Eds.), "Understanding chimpanzees". Harvard University Press, 252-265.

Fujita, K. & Matsuzawa, T. (1990) Delayed figure reconstruction by a chimpanzee (Pan troglodytes) and humans (Homo sapiens). Journal of Comparative Psychology, 104, 345-351.

Hikami, K., Hasegawa, Y., & Matsuzawa, T. (1990) Social transmission of food preferences in Japanese monkeys (Macaca fuscata): Analysis by the food-aversion learning. Journal of Comparative Psychology , 104, 233-237.

Matsuzawa, T. (1990) Form perception and visual acuity in a chimpanzee. Folia Primatologica, 55, 24-32.

Matsuzawa, T. (1990) Spontaneous sorting in human and chimpanzee. In Parker, S. and Gibson, K. (Eds.), "Language and intelligence in monkeys and apes: Comparative developmental perspectives". Cambridge University Press, 451-468.

Matsuzawa, T., Sakura, O., Kimura, T., Hamada, Y., and Sugiyama, Y. (1990) Case report on the death of a wild chimpanzee (Pan troglodytes verus). Primates, 31(4), 635-641.

Jitsumori, M. & Matsuzawa, T. (1991) Picture perception in monkeys and pigeons: Transfer of rightside-up versus upside-down discrimination of photographic objects across conceptual categories. Primates, 32(4), 473-482.

Kida, M., Abe, H., Matsuzawa, T., & Matsubayashi, K. (1991) Effects of the probability of stimulus presentation and of the frequency of the tones on auditory event related potentials in monkeys under various hypoxia of simulated high altitude. Primates, 32, 371-378.

Matsuzawa, T. (1991) The duality of language-like skill in a chimpanzee (Pan troglodytes). In Ehara, A., Kimura, T., Takenaka, O., and Iwamoto, M. (Eds.), "Primatology today". Elsevier: Amsterdam, 317-320.

Matsuzawa, T. (1991) Nesting cups and meta-tool in chimpanzees. Behavioral and Brain Sciences, 14(4), 570-571.

Sakura, O. & Matsuzawa, T. (1991) Flexibility of wild chimpanzee nut-cracking behavior using stone hammers and anvils: an experimental analysis. Ethology, 87, 237-248.

Tomonaga, M., Matsuzawa T., Fujita, K., & Yamamoto, J. (1991) Emergence of symmetry in a visual conditional discrimination by chimpanzees (Pan troglodytes). Psychological Reports, 68, 51-60.

Tomonaga, M., Matsuzawa, T., & Matano, S. (1991) Perception and processing of complex geometrical figures in chimpanzee (Pan troglodytes). In Ehara, A., Kimura, T., Takenaka, O., and Iwamoto, M. (Eds.), "Primatology today". Elsevier: Amsterdam, 313-316.

Tomonaga, M. & Matsuzawa T. (1992) Perception of complex geometric figures in chimpanzees and humans: Analysis based on choice reaction time. Journal of Comparative Psychology, 106(1), 43-52.

Itakura, S., & Matsuzawa,T. (1993) Acquisition of personal pronouns by a chimpanzee. Roitblat, H.,Herman, L., Nachtigall, P. (eds.), "Language and Communication:Comparative Perspectives". Lawrence Erlbaum, 347-363.

Sugiyama, Y., Fushimi, T., Sakura, O., & Matsuzawa, T. (1993) Hand Preference and tool use in wild chimpanzees. Primates, 34(2),151-159.

Tomonaga, M., Itakura, S., & Matsuzawa, T. (1993) Superiority of conspecific faces and reduced inversion effect in face perception by a chimpanzee. Folia Primatologica, 61, 110-114.

Matsuzawa, T. (1994) Field experiments on use of stone tools by chimpanzees in the wild. In Wrangham, R. et al.(eds.), "Chimpanzee Cultures". Harvard Univ. Press, 351-370.

Tonooka, R. & Matsuzawa, T. (1995) Hand preferences of captive chimpanzees (Pan troglodytes) in simple reaching for food. International Journal of Primatology, 16, 17-35.

Iversen, I. & Matsuzawa, T. (1996) Visually guided drawing in the chimpanzee (Pan troglodytes). Japanese Psychological Research, 38(3), 126-135.

Matsuzawa, T. & Yamakoshi, G. (1996) Comparison of chimpanzee material culture between Bossou and Nimba, West Africa. In Russon, A., Bard, K., & Parker, S. (eds.), "Reaching into thought". Cambridge Univ. Press, 211-232.

Matsuzawa, T. (1996) Chimpanzee intelligence in nature and in captivity: isomorphism of symbol use and tool use. In McGrew, W. et al. (eds.), "Great Ape Societies". Cambridge Univ. Press, 196-209.

Matsuzawa, T., Kojima, S. & Jitsumori, M. (1996) Editorial: A brief note on the historical background of the study of cognition and behavior in nonhuman primates by Japanese researchers. Japanese Psychological Research, 38(3), 109-112.

Inoue-Nakamura, N. & Matsuzawa, T. (1997) Development of stone tool-use by wild chimpanzees (Pan troglodytes). Journal of Comparative Psychology, 111(2), 159-173.

Iversen, I. & Matsuzawa, T. (1997) Model-guided line drawing in the chimpanzee (Pan troglodytes).Japanese Psychological Research, 39(3),154-181.

Matsuzawa,T. (1997) Phylogeny of intelligence: A view from cognitive behavior of chimpanzees. IIAS Reports, No.1997-004, 17-26.

Matsuzawa, T (1997) The death of an infant chimpanzee at Bossou, Guinea. Pan Africa News, 4(1):4-6.

Matsuzawa, T., Kojima, S. & Shinohara, S. (1997) Editorial: A brief note on the background of the study of cognition and behavior of chimpanzees by Japanese researchers. Japanese Psychological Research, 39(3), 133-139.

Ochiai, T. & Matsuzawa, T. (1997) Planting trees in an outdoor compound of chimpanzees for an enriched environment. Proceedings of the third international conference on environmental enrichment. October, Orlando, Florida.

Suzuki, S. & Matsuzawa, T. (1997) Choice between two discrimination tasks in chimpanzees (Pan troglodytes). Japanese Psychological Research, 39(3), 226-235.

Tonooka, R., Tomonaga, M. & Matsuzawa, T. (1997) Acquisition and transmission of tool making and use for drinking juice in a group of captive chimpanzees (Pan troglodytes). Japanese Psychological Research, 39(3), 253-265.

Hirata, S., Myowa, M., & Matsuzawa, T. (1998) Use of leaves as cushions to sit on wet ground by wild chimpanzees. American Journal of Primatology, 44: 215-220.

Matsuzawa, T. (1998) Chimpanzee behavior: comparative cognitive perspective. In: Greenberg, G. & Haraway, M. eds., "Comparative psychology: A handbook", Garland Publishers Inc., NY, 360-375.

Biro, D. & Matsuzawa, T. (1999) Numerical ordering in a chimpanzee (Pan troglodytes) : planning, executing, monitoring. Journal of Comparative Psychology, 113(2), 178-185.

Matsuzawa, T. (1999) Communication and tool use in chimpanzee: Cultural and social contexts. In: Hauser, M. & Konishi, M. eds., "The design of Animal communication", Cambridge University Press, 645-671.

Myowa-Yamakoshi, M. & Matsuzawa, T. (1999) Factors influencing imitation of manipulatory actions in chimpanzees (Pan troglodytes). Journal of Comparative Psychology, 113(2), 128-136.

Kawai, N. & Matsuzawa, T. (2000) Numerical memory span in a chimpanzee. Nature, 403: 39-40.

Kawai, N. & Matsuzawa, T. (2000) 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. (2000) Imitation of intentional manipulatory actions in chimpanzees (Pan troglodytes). Journal of Comparative Psychology, 114(4): 381-391.

Tsuji, K., Hayashibe, K., Hara, M. & Matsuzawa, T. (2000) Visuo-motor development which causes detection of visual depth from motion and density cues. Swiss Journal of Psychology, 59: 102-107.

Biro. D. & Matsuzawa T. (2001) Use of numerical symbols by the chimpanzee (Pan troglodytes): Cardinals, ordinals, and the introduction of zero. Animal Cognition, 4:193-199.

Hirata, S., Yamakoshi, G., Fujita, S., Ohashi, G. & Matsuzawa, M. (2001) Capturing and toying with hyraxes (Dendrohyrax dorsalis) by wild chimpanzees (Pan troglodytes) at Bossou, Guinea. American Journal of Primatology, 53(2): 93-97.

Hirata, S. & Matsuzawa, T. (2001) Tactics to obtain a hidden food item in chimpanzee pairs (Pan troglodytes). Animal Cognition, 4: 285-295.

Humle, T. & Matsuzawa, T. (2001) Behavioural diversity among the wild chimpanzee populations of Bossou and neighbouring areas, Guinea and Cote d'Ivoire, West Africa. Folia Primatologica, 72(2):57-68.

Iversen, I. & Matsuzawa, T. (2001) Acquisition of navigation in an automated fingermaze task for the chimpanzee. Animal Cognition, 4: 179-192.

Kawai, N. & Matsuzawa, T. (2001) "Magical number 5" in a chimpanzee. Behavioral and Brain Sciences, 24: 127-128.

Matsuzawa, T. (2001) Primate origins of human cognition and behavior, T. Matsuzawa ed., Springer-Verlag Tokyo: Tokyo, pp.587.

Matsuzawa, M. (2001) Primate foundations of human intelligence: A view of tool use in nonhuman primates and fossil hominids. In: Primate origins of human cognition and behavior, T. Matsuzawa ed., Springer-Verlag Tokyo: Tokyo, pp.3-25.

Matsuzawa, T., Biro, D., Humle, T., Inoue-Nakamura, N., Tonooka, R. & Yamakoshi, G. (2001) Emergence of culture in wild chimpanzees: Education by master-apprenticeship. In: Primate origins of human cognition and behavior, T. Matsuzawa ed., Springer-Verlag Tokyo: Tokyo, pp.557-574.

Morimura, N. & Matsuzawa, T. (2001) Memory of Movies by Chimpanzees (Pan troglodytes). Journal of Comparative Psychology, 115(2): 152-158.

Sousa, C. & Matsuzawa, T. (2001) The use of tokens as rewards and tools by chimpanzees. Animal Cognition, 4: 213-221.

Humle, T., Matsuzawa, T. (2002) Ant-dipping among the chimpanzees of Bossou, Guinea, and some comparisons with other sites. American Journal of Primatology 58(3): 133-148.

Matsuzawa, T. (2002) Chimpanzee Ai and her son Ayumu: An episode of education by master-apprenticeship. In: M. Bekoff, C. Allen, & Burghardt, G. (eds.) "The cognitive animal" (pp.189-195), Cambridge: The MIT Press.

Okamoto, S., Tomonaga, M., Ishii, K., Kawai, N., Tanaka, M. & Matsuzawa, T. (2002) An infant chimpanzee (Pan troglodytes) follows human gaze. Animal Cognition, 5(2):107-114.

Tomonaga, M, & Matsuzawa, T. (2002) Enumeration of briefly presented items by the chimpanzee (Pan troglodytes) and humans (Homo sapiens). Animal Learning and Behavior, 30(2):143-157.

Biro, D., Inoue-Nakamura, N., Tonooka, R., Yamakoshi, G., Sousa, C., & Matsuzawa, T. (2003) Cultural innovation and transmission of tool use in wild chimpanzees: evidence from field experiments. Animal Cognition, 6(4):213-223.

Hayashi, M. & Matsuzawa, T. (2003) Cognitive development in object manipulation by infant chimpanzees. Animal Cognition, 6(4): 225-233.

Iversen, I. & Matsuzawa, T. (2003) Development of interception of moving targets by chimpanzees (Pan troglodytes) in an automated task. Animal Cognition, 6(3): 169-183.

Matsumoto-Oda, A., Oda, R., Hayashi, Y., Murakami, H., Maeda, N., Kumazaki, K., Shimizu, K. & Matsuzawa, T. (2003) Vaginal fatty acids produced by chimpanzees during menstrual cycles. Folia Primatologica, 74(2): 75-79.

Matsuzawa, T. (2003) The Ai project: historical and ecological contexts. Animal Cognition, 6(4): 199-211.

Myowa-Yamakoshi, M., Tomonaga, M., Tanaka, M. & Matsuzawa, T. (2003) Preference for human direct gaze in infant chimpanzees (Pan troglodytes). Cognition, 89(2):113-124.

Nishimura, T., Mikami, A., Suzuki, J. & Matsuzawa, T. (2003) 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. (2003) Urinary steroids, FSH and CG measurements for monitoring the ovarian cycle and pregnancy in the chimpanzee. Journal of Medical Primatology 32(1):15-22.

Sousa, C., Okamoto, S. & Matsuzawa, T. (2003) Behavioural development in a matching-to-sample task and token use by an infant chimpanzee reared by his mother. Animal Cognition, 6(4):259-267.

Tanaka, M., Tomonaga, M. & Matsuzawa, T. (2003) Finger drawing by infant chimpanzees (Pan toroglodytes). Animal Cognition, 6:245-251.

Anderson, J., Myowa-Yamakoshi, M. & Matsuzawa, T. (2004) Contagious yawning in chimpanzees. Biology Letters (The Royal Society), 271, S468 - S470.

Humle, T. & Matsuzawa, T. (2004) Oil palm use by adjacent communities of chimpanzees at Bossou and Nimba Mountains, West Africa. International Journal of Primatology, 25(3):551-581.

Kuwahata, H. Adachi, I., Fujita, K., Tomonaga, M., & Matsuzawa, T. (2004) Development of schematic face preference in macaque monkeys. Behavioral Processes, 66(1):17-21.

Matsuno, T., Kawai, N. & Matsuzawa, T. (2004) Color classification by chimpanzees (Pan troglodytes) in a matching to sample task. Behavioural Brain Research, 148(1-2):157-165.

Myowa-Yamakoshi, M., Tomonaga, M., Tanaka, M. & Matsuzawa, T. (2004) Imitation in neonatal chimpanzees (Pan troglodytes). Developmental Science, 7(4):437-442.

Tomonaga, M., Tanaka, M., Matsuzawa, T., Myowa-Yamakoshi, M., Kosugi, D., Mizuno, Y., Okamoto, S., Yamaguchi, M., and Bard, K. (2004) Development of social cognition in infant chimpanzees (Pan troglodytes): Face recognition, smiling, gaze, and the lack of triadic interactions. Japanese Psychological Research, 46(3), 227-235.

Ueno, A. & Matsuzawa, T. (2004) Food transfer between chimpanzee mothers and their infants. Primates, 45:231-239.

Matsuzawa, T., Nakamura, M. (2004) Caregiving: mother-infant relations in chimpanzees. In: M. Bekoff (ed.) "Encyclopedia of animal behavior", Greenwood press, pp.196-203.

Ueno, A. & Matsuzawa, T. (2005) Response to novel food in infant chimpanzees: Do infants refer to mothers before ingesting food on their own? Behavioural Processes, 68(1):85-90.

Matsuzawa, T. (2005) Primate viewing. Nature, 434, 21-22.

Hayashi, M., Mizuno, Y., & Matsuzawa, T. (2005) How does the stone-tool use emerge? Introduction of stones and nuts to naive chimpanzees in captivity. Primates, 46:91-102

Bard, K. A., Myowa-Yamakoshi, M., Tomonaga, M., Tanaka, M., Quinn, J., Costall, A., & Matsuzawa, T. (2005) Group differences in the mutual gaze of chimpanzees (Pan troglodytes). Developmental Psychology, in press.

Murai, C., Kosugi, D., Tomonaga, M., Tanaka, M., Matsuzawa, T., & Itakura, S. (2005) Can chimpanzee infants (Pan troglodytes) form categorical representations in the same manner as human infants (Homo sapiens)? Developmental Science, in press.

Myowa-Yamakoshi, M., Yamaguchi, M., Tomonaga, M., Tanaka, M., Matsuzawa, T. (2005) Development of face recognition in infant chimpanzees (Pan troglodytes). Cognitive Development, in press.

Matsuzawa, T. Tomonaga M. Tanaka M.(2006) Cognitive Development in Chimpanzees, Springer.