Katsuyo Oishi

Katsuyo Oishi

Partner, PwC Tax Japan

Financial Services
Personal Income Tax Services
CPA / Certified Public Tax Accountant


Mr. Oishi is a PwC Tax Japan partner who has expertise and knowledge of commercial realities and has primarily helped multinational financial institutions and investment funds to meet their Japanese and foreign tax compliance and M&A deals requirements. His prior experience with a US-based investment bank has provided him with deep knowledge in this area.

He is a Japanese Certified Public Accountant and Japanese licensed Tax Consultant.

Contact Form

Contact details


Project Results and Achievements

Mr. Oishi has assisted Japanese and foreign based financial institutions, trading companies, manufacturing companies, and investment funds on their cross-border acquisition and restructuring transactions for tax due diligence, structuring and post-deal consultations.

Specifically, he has helped with critical tax issues such as anti-tax haven rules, foreign tax credits, and transfer pricing. He also has extensive experiences in dealing with Japanese tax authority audits.

Other Activities

Member of the International Committee of the The Japanese Institute of Certified Public Accountants

Professional Vision

Mr. Oishi’s professional vision is to build continued trust with clients to help solve complex problems.