Lecturer Osaka City University Medical School, since 1978. Chief department orthopedic surgery Osaka Minami National Hospital, 1978-2001, vice director, 1993-2001. Lecturer Osaka University Medical School, since 1980.
Guest professor National Biomechanics Research Center, Montpelier, France, 1975—1976, Kyoto University, since 1993. President 1st through 6th International Symposium on Ceramics in Medicine, 1989—1992. Director H. Oonishi Memorial Joint Replacement Institute Tominaga Hospital, since 2001, 14th and 15th International Symposium for Technology of Anthropology, 2001.
Member of others, Japanese Society for Artificial Organs, Japanese Society for Biomaterials, Future Sciences in Japanese Minister of Science, Japanese Society for Artificial Joints, Japanese Society for Joint Surgery, Central Japanese Orthopaedics Surgery Society, Japanese Society for Orthopaedics Biomechanics, Japanese Society for Orthopaedics Ceramic Implants (national chairman, editor proceedings), Japanese Association Orthopedic Surgery, Orthopaedics Research Society in United States of America, American Society Biomaterials, European Society for Biomaterials, International Hip Society, 14th and 15th International Society Technology Arthroplasty (president 2001-2002), International Society Technology Anthroplasty (board directors), International Symposium on Ceramic in Medicine.