Professor Emeritus of Bunsei University of Art. After he graduated Keio University and Waseda Graduateschool , he worked in Bunsei University of Art as a professor, at Kanuma Municipal Art Museum for Kawakami Sumio as the director, at Seibunsha Publishing as a editor-in-chief, at The Society of Japonism as a director and as CEO of Tamaseido Inc. now. A part of publications are The Life and Work of KAWAKAMI SUMIO (Shimotuke Simbunsha 2004), Was Vincent Killed ? (Asahi Shimbunsha 2008), The Last 70 Days of Vincent van Gogh (BS JAPAN TV program 2008), van Gogh Died(Kadokawa Publishing 2010), GOGH / The Truth of 120 years ago (TBS TV program 2011).