He entered Showa Audit Corporation in 1982 (now Ernst & Young ShinNihon LLC). Then he served as a senior partner of Shinbashi Audit Corporation for 27 years from 1987 to 2014.In 2008, he established and became a senior partner of Kyodo Tax, Co. In 2018, he merged with Shiodome Partners Tax Corporation and became its senior partner. For many years, he has been involved in audit, IPO and business taxation. Moreover, he is a committee member of the JA group's qualification examination and he has been a member of the government office. He graduated from Chuo Graduate School of Strategic Management (Ph.D.). He holds a Doctor of Philosophy degree and is a Certified Public Accountant, as well as a Tax Accountant.