LAWYER PROFILE
Atsushi Oishi

Atsushi Oishi

Asia-Pacific 2026

Chambers ranking badge
Chambers ranking badge

Ranked in 2 practice areas

Tax: Bengoshi

Japan

9 years ranked

Contributions and articles

1 Global Practice Guides

About

Provided by Mori Hamada

Asia-Pacific

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 Asia & Pacific

Tax: Bengoshi - Japan

Band 1
Band 1

Individual Editorial
Atsushi Oishi is a highly respected taxation expert with a broad offering spanning transactional and regulatory work, including transfer pricing and audit matters, with additional expertise in tax disputes.

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.

Strengths

Provided by Chambers

  • We are grateful for his legal services, including his prompt and clear opinions.

    Tax: BengoshiChambers Asia & Pacific
  • When we're conducting consultations and building complex schemes, he's the first person we consult with.

    Tax: BengoshiChambers Asia & Pacific

Ranked Individuals at Mori Hamada (70)

Japan

All Contributions (1)

Provided by Mori Hamada

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