Bachelor, Aoyama Gakuin University, Tokyo, 1960. Master of Arts, Aoyama Gakuin University, Tokyo, 1964. Doctor of Philosophy, Harvard University, 1977.
Assistant professor Tokyo University Agriculture, 1964-1966, Osaka (Japan) University Foreign Studies, 1966-1968, associate professor, 1968-1973. Teaching fellow Harvard University, Cambridge, Massachusetts, 1970-1972. Lecturer Boston University, 1972-1976.
Visiting instructor University Massachusetts, Amherst, 1976-1977. Assistant professor Occidental College, Los Angeles, 1978-1985. Computational linguist Weidner Communications Corporation, Northbrook, Illinois, 1985-1987.
Associate professor North Center College, Naperville, since 1987.
Member Association Computational Linguistics, Linguistic Society of America, Association Computing Machinery, Institute of Electrical and Electronics Engineers Computer Society.
Married Mariko Ito, April 12, 1958.