April 1988 NOMURA SECURITIES Co., Ltd. Arm, Inc. July 1995 Roland Berger and PartnerJapan (currently Roland Berger Co., Ltd.) August 2000, Director, Arm Co., Ltd. April 2004, Executive Operating Officer, MIROKU JYOHO SERVICE CO., LTD.June 2008 Executive Director of the same CFO April 2015 CTO June 2017 Representative Director of BREEZE Co., Ltd. January 2019Director of bitFlyer