The comparative approach covering the diversity of primate species to show the cognition and behavior of primates including humans

Both experimental approach and observational approach are combined

to Comparative Cognitive Science.- Primate Foundations of Human Intelligence: A View of Tool Use in Nonhuman Primates and Fossil Hominids.- Phylogeny of Perception and Cognition.- What You See is Different from What I See: Species Differences in Visual Perception.- Investigating Visual Perception and Cognition in Chimpanzees (Pan troglodytes) Through Visual Search and Related Tasks: From Basic to Complex Processes.- Processing of the Global and Local Dimensions of Visual Hierarchical Stimuli by Humans (Homo sapiens), Chimpanzees (Pan troglodytes), and Baboons (Papio papio).- How Do We Eat? Hypothesis of Foraging Strategy from the Viewpoint of Gustation in Primates.- Origin of Human Speech: Auditory Perception and Vocalization.- Lemur Vocal Communication and the Origin of Human Language.- Vocal Exchange of Coo Calls in Japanese Macaques.- Hearing and Auditory-Visual Intermodal Recognition in the Chimpanzee.- Early Vocal Development in a Chimpanzee Infant.- Learning and Memory.- Chimpanzee Numerical Competence: Cardinal and Ordinal Skills.- Reproductive Memory Processes in Chimpanzees: Homologous Approaches to Research on Human Working Memory.- Establishing Line Tracing on a Touch Monitor as a Basic Drawing Skill in Chimpanzees (Pan troglodytes).- Object Recognition and Object Categorization in Animals.- Recognition of Self, Others, and Species.- Mirror Self-Recognition in Primates: An Ontogenetic and a Phylogenetic Approach.- The Level of Self-Knowledge in Nonhuman Primates: From the Perspective of Comparative Cognitive Science.- Self- and Other-Control in Squirrel Monkeys.- Evolutionary Foundation and Development of Imitation.- Species Recognition by Macaques Measured by Sensory Reinforcement.- Evolution of the Human Eye as a Device for Communication.- Society and Social Interaction.- A Review of 50 Years of Research on the Japanese Monkeys of Koshima: Status and Dominance.- Mother-Offspring Relationship in Macaques.- The Myth of Despotism and Nepotism: Dominance and Kinship in Matrilineal Societies of Macaques.- Decision Making in Social Interactions by Monkeys.- Culture.- "Sweet-Potato Washing" Revisited.- Tube Test in Free-Ranging Japanese Macaques: Use of Sticks and Stones to Obtain Fruit from a Transparent Pipe.- Tool Use by Chimpanzees (Pan troglodytes) of the Arnhem Zoo Community.- Ecology of Tool Use in Wild Chimpanzees: Toward Reconstruction of Early Hominid Evolution.- Emergence of Culture in Wild Chimpanzees: Education by Master-Apprenticeship.