LAWYER PROFILE
Atsushi Oishi

Atsushi Oishi

Global 2026

Chambers ranking badge
Chambers ranking badge

Ranked in 1 practice area

Contributions and articles

1 Global Practice Guides

About

Provided by Mori Hamada

Practice Areas

M&A (M&A / Reorganizations / Capital and Business Alliances, Private Equity, Cross-Border M&A); Tax (Tax Investigations and Disputes, Tax Planning); Wealth Management; Dispute Resolution; Corporate Law (Corporate and Commercial Disputes)

Career

Background

The University of Tokyo (LL.B., 1996); New York University School of Law (LL.M., 2003); Weil, Gotshal & Manges, New York (2003-2004)

Major Activities

Member of Task Force on Management Buy Out and Other Transactions, organized by Ministry of Economy, Trade and Industry (2007); Member of Expert Committee on Anti-Tax Haven Legislation and Intangible Assets, organized by Ministry of Economy, Trade and Industry (2013); Invited Researcher at Global Family Business Research Institute, Waseda University (2016-); Member of PB Professional Ethics Review Committee, The Securities Analysts Association of Japan (2018-); Member of PB Education Committee, The Securities Analysts Association of Japan (2018-); Member of Study Group on Family Business Governance, Ministry of Economy, Trade and Industry (2025-)

Professional Memberships

admitted in Japan, 1998; New York, 2004; Japan-Licensed Tax Accountant (2006); Certified as Support Agencies for Business Innovation (2018)

Chambers Review

Provided by Chambers

Chambers Global Guide

Corporate/M&A: Domestic - Japan

Band 4
Band 4

Individual Editorial

Atsushi Oishi remains active on mergers and has experience in corporate restructuring. He also advises on cross-border financing mandates.

Ranked Individuals at Mori Hamada (42)

China

  • Profile image of Yoshifumi Onodera
    Yoshifumi Onodera

    Intellectual Property (International Firms)

    View profile

Global Market Leaders

Japan

All Contributions (1)

Provided by Mori Hamada

What success is built on

Chambers is the leading data and intelligence partner for the legal sector.

Explore thought leadership