He is currently an emeritus fellow in National Institute for Materials Science (NIMS), Tsukuba, Japan. He received his Bachelor’s degree in Physics (in 1964), Master’s degree in Physics (in 1967) and Ph.D degree in Physics (in 1970) from Tokyo Metropolitan University. He has worked at Toshiba R&D Center from 1970 to 2000. He was a chief fellow during 1996 - 2000. He moved to Tohoku University as a professor of Department of Materials Science in 2000. He also worked as a project leader of National CREST-JST Project “Development of fundamental technologies for spin quantum dot memories” during 2001 - 2007. He retired Tohoku University in 2006 due to the retired age. He entered NIMS as a NIMS fellow and a leader of spintronics group in 2006. He is an emeritus fellow since 2010. He was also a Chair Professor of Department of Electronic Engineering, Hanyang University, Seoul, Korea during 2013 - 2014. He has worked on research and development of magnetic materials and devices concerning rare earth permanent magnets, amorphous materials, metallic multilayers and spintronics. He has served as board of directors in Magnetic Society of Japan during 1989 - 1992, an editor of IEEE INTERMAG Conference (Seoul, Korea, 1998) and a member of Graduate Student Award Judge at the Materials Research Society Fall Meeting, (Boston, 2008). He has received Magnetics Society of Japan Award (2009), Fellow of The Japan Society of Applied Physics (2008), Purple Ribbon Medal from the Prime Minister, Japan (2000), Real Advances in Materials Award from National Association for Science, Technology and Society, USA (1994), etc.