Bachelor of Science in Engineering, Hiroshima University, 1989. Master of Science, Hiroshima University, 1991. Doctor of Philosophy, Hiroshima University, 1994.
Assistant professor Tottori (Japan) University, 1994-1995, associate professor, since 1995.
Member Institute of Electrical and Electronics Engineers, Information Processing Society of Japan, Institute of Electronics, Information and Communications Engineers Japan, Operations Research Society Japan, Reliability Engineering Association Japan (Takagi award 1999).