1. Graduate School of Engineering, Osaka University, now Research Fellow of Japan Society for the Promotion of Science (National Institute of Advanced Industrial Science and Technology)
2. Goaduate School of Engineering,Osaka University, now Fuji Heavy Industries Ltd.
3. Profesor Emeritus, Osaka University (Senior advisor, Tocalo Co., Ltd.)
4. Professor Emeritus,Osaka University (Visiting Professor,Osaka City University)