- Assistant, Kyoto Gakugei University, 1949-1954. Member faculty Kyoto University, since 1954, associate professor, 1958-1968, professor, since 1968.
Author: (with others) Development of Cognition, 1980. Development of Language in Handicapped Children, 1981. Perception of Speech Sounds, 1982.
Development of Language in Childhood, 1983. Development of Cognition and Language Development in Infancy, 1984. Member editorial board Studia Phonologica, since 1963.