College, 1946-1948, professor, 1948-1954. Associate professor physics University Osaka Prefecture, Japan, 1954-1961. Associate professor physics University Tokyo, 1961-1967.
Professor metal physics Nagoya (Japan) University, since 1967, chairman department metallurgy, 1969-1970, 73-74, 81-82.
Member international advisory committee 10th International Congress on Electron Microscopy, Hamburg, 1982. Member Japan Institute Metals (director 1973-1977, 84–, vice president 1981-1982, 84-85, president 1985-1986, 1st. prize Metallographic Exhibition 1970), Physical Society Japan (director 1970-1975), Japanese Society Electron Microscopy (director 1969-1971, Seto award 1970), Japan Society Promotion of Science (judging committee since 1981, international judge, Acta Metallurgica gold medal, 1983-1986), England Academy of Japan, Iron and Steel Institute Japan, Royal Microscopical Society (England), Metals Society (England), Sigma Xi.