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Atsumi & Sakai

Work +81 3 5501 2111
Fax +81 3 5501 2211
London, Tokyo

Go Hashimoto

Work +81 3 5501 2162
Atsumi & Sakai

Work Department

Corporate, Litigation, Arbitration, Insolvency, Business Revitalization, International Practice, Innovation




Japan Bank for International Cooperation (1989-1993)
US law firm, New York office (1997-2000)
Bingham McCutchen LLP (2000-2008)
Greenberg Traurig LLP (2008-2009)
Member of the Ministry of Economy, Trade and Industry’s "Review Board on the FY 2012 Subsidy Program for Projects Promoting Asian Site Locations in Japan, etc. (Research and Analysis on High-Value Investment Strategy in Japan)"  (2012-2013)
Auditor, Cyber Risk Information Risk Information Center (2013-)
Member of the Ministry of Economy, Trade and Industry’s Survey of Establishing Investment Tie-ups with Overseas Entities (2013-)
Member of the Ministry of Economy, Trade and Industry’s Direct Inward Investment Study Forum (2013-)
Faculty member, the Cysec program of Tokyo Denki University (2015-)
Nishimura & Asahi (2009-2017)


Japanese and English


Daiichi Bar Associaion, State of New York, the United States of America 


The University of Tokyo (LL.B., 1989)
University of Pennsylvania Law School (LL.M., 1992)
Columbia Law School (J.D., 1996)
Columbia University, School of International and Public Affairs (M.I.A., 1997)

Japan: Corporate and M&A

Corporate and M&A ‚Äď Independent local firms

Within: Corporate and M&A ‚Äď Independent local firms

Atsumi & Sakai has welcomed Go Fujimoto, Go Hashimoto and Hisashi Miyatsuka from 'Big Four' firm Nishimura & Asahi, as well as Akimoto Kawamura from Citigroup, further strengthening the practice. Global Infrastructure Partners engaged a team led by Hiroyuki Sanbe as Japanese counsel on its acquisition of a 100% equity interest in the wind and solar portfolios of Equis Funds. Meanwhile, dispute resolution partner Bonnie Dixon handled Advanced Energy Industries' takeover of Japanese manufacturer Trek Holdings. Also notable is Ashish Jejurkar's work for PayMate and its promoter pertaining to the regulatory aspects of the investment by Mayfair101. Miho Niunoya assisted a Japanese power company with its purchase of shares in a foreign project company established to develop a geothermal power plant in South East Asia. Further key contacts include senior partner Shintaro Hamasu and Masayuki Matsuura .

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Japan: Dispute resolution

Dispute resolution ‚Äď Independent local firms

Within: Dispute resolution ‚Äď Independent local firms

Atsumi & Sakai covers a wide range of dispute resolution matters, including overseas class-action lawsuits, securities litigation, international arbitration and mediation, and criminal defence. Teruhisa Toyama is currently representing major institutional investors as plaintiffs in a suit seeking compensation for damages arising from misstatements in Toshiba's annual reports, and Kunihiro Sumida teamed up with senior partner Guohui Fan to advise a Chinese trading company on its JCAA claim against a Japanese automobile company; the matter related to the non-renewal of a dealer agreement. Meanwhile, in the Supreme Court, Kumpei Ohashi defended a woman before prosecuted for the death of her daughter. Bonnie Dixon is also highlighted for novel claims. The team recently strengthened its lineup through the addition of Go Hashimoto and Hisashi Miyatsuka from Nishimura & Asahi and Kenichiro Saito from a public prosecution practice; Tatsuya Fukui departed the firm.

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Japan: Intellectual property

Intellectual property ‚Äď Independent local firms

Within: Intellectual property ‚Äď Independent local firms

The 'excellent‚Äô Atsumi & Sakai¬†provides ‚Äėdistinguished knowledge and experience‚Äô across the IP sector, acting in registration, protection, use and licensing of patent rights, copyrights and trade mark rights matters, as well as a broad range of emerging issues such as¬†IT-related matters.¬†Life sciences and technology specialist Chie Kasahara¬†co-heads the team known for its ‚Äėreliability and integrity‚Äô along with Kunihiro Sumida¬†and Ian S. Scott. Also noteworthy is Go Hashimoto, who experienced in dispute resolution and cross-border licensing transactions for pharmaceutical and high technology clients.

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Legal Developments in Japan

Legal Developments and updates from the leading lawyers in each jurisdiction. To contribute, send an email request to
  • Taking control of a Japanese publicly listed company:

    Introductory notes for successfully completing an M&A
  • Yuasa and Hara Business Law News

    Contents of the Issue Law on liability for breach of contract Review on the amendment to the cabinet office order on Corporate Disclosure

    The Minister for Justice, Alan Shatter (‚Äúthe Minister‚ÄĚ), has published the Criminal Justice Bill 2011 (‚Äúthe Bill‚ÄĚ). The main purpose of the Bill is stated to be ‚Äú‚Ķto amend the criminal law to improve certain procedural matters and strengthen Garda investigative powers. The intention is that such improvements will assist in reducing the delays associated with the investigation and prosecution of complex crime, in particular white collar crime.‚ÄĚ
  • Japan: New legislative framework for Sukuk

    The new framework passed in May 2011 will provide a solid legal platform for issuing Sukuk Ijarah under Japanese law. NAOKI ISHIKAWA highlights key legal structures and tax treatment in respect of the anticipated Sukuk issuances in Japan.
  • Yakult Bottle Acquired Distinctiveness

    Do you know about Yakult's delicious lactic acid drink which is contained in a small bottle? Yakult's lactic acid drink (hereafter referred to as "Yakult drink") is the most famous lactic acid drink in Japan and today is also being sold in many countries around the world. When you are enjoying Yakult drink, please keep in mind the case mentioned below.
  • Tax: Japan: International Joint Ventures

    Tax on international joint ventures. Country Q&A (Japan).
  • Japan: Recent Developments in Practice and Law

    The successful closing of two Islamic fi nance transactions which was announced in July 2010 by Nomura Holdings have paved a concrete path for Japanese corporations to consider overseas Islamic fi nance markets for their fund raising activities. The fi rst transaction was in Asia for the issuance of Sukuk Ijarah and the second was in the Middle East for the establishment of a Commodity Murabahah facility (Nomura Deals).
  • Renewable energy takes off in Japan

    Like many other countries, Japan has decided to reform its renewable energy (RE) policy, to dramatically increase the use of renewable energy. The core policy mechanism is a feed-in tariff (FIT). This chapter summarises the contemplated Japanese FIT and its practical impact on existing and future investment in this sector, providing an overview of:
  • Licensing - 2010

    Q & A on Licensing in Japan 
  • Law on the Civil Jurisdiction of Japanese Courts over Foreign Countries, etc.

    The Law has been enacted to clarify the scope of application of the civil jurisdiction of Japanese courts over foreign countries, etc., and set exceptions to civil preocedings involving foreign countries, etc., based on the United Nations Convention on the Jurisdictional Immunities of States and their property (UN Convention on Immunities) (see Article 1).