Former CEO of KPMG Japan, Chief Executive Officer of KPMG AZSA LLC, 2005
Former Director of JICPA (Japan Institute of Certified Public Accountants), 1998
Inspector of Japan-China Economic Association – Current
Advisor of LEXER RESEARCH Inc. -Current　　　 
Advisor of Yukimai Design Co.,Ltd. -Current　　　 
Advisor of HPDU OF JAPAN -Current
Auditor of Integral Geometry Science Inc,. -Current　　　 
Vice-president of  Workroid Users Association -Current　　　 
Auditor of japan cultural promotion project -Current　　　 
Auditor of The Norinchukin Bank -Current　　 
Special Advisor of ICHIRYU ASSOCIATES, Inc. -Current　　 
Independent Director of Doctorbook INC. -Current　　 
CEO of Sakai & Partners-Current
Auditor & Supervisory Board Member of Mediahouse Holdings Co.,Ltd.-Current
Director of KeiaiStar Real Estate Co., Ltd.-Current