April 1999: Kanto-Shinetsu Regional Taxation Bureau
October 2001: Sony Computer Entertainment Inc. (currently Sony Interactive Entertainment Inc.)
October 2008: FAST RETAILING CO., LTD.
May 2011: TDK Corporation
August 2014: SKYLARK CO., LTD. (currently SKYLARK HOLDINGS CO., LTD.)
June 2018: Mercari, Inc.
October 2018: Opt Holding, Inc. (currently Digital Holdings, Inc.)
April 2024: Executive Vice President, Digital Holdings, Inc. & Director, OPT, Inc. (current position)