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Atsumi & Sakai

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

Kunihiro Sumida

Work +81 (0)3 5501 2175
Atsumi & Sakai

Work Department

Litigation, Atbitaration, Insolvency and Business Revitalization PG, Corporate PG, International PG


Partner (Labor and Employment, International Trading and Legal Affairs, Intellectual Property Law, Litigation, Arbitration, M&A, Sports Law and General Corporate Legal Affairs)


Partner at Atsumi & Sakai (2013-present); Hayabusa Asuka Law Offices LLP (April 2009-December 2012); Sonderhoff & Einsel Law and Patent Office LLP (December 2003-March 2009); Dorsey & Whitney LLP (2001-2003); Doctor Sonderhoff Law Office LLP (2000-2001).


Japanese and English.


Tokyo Bar Association


Meiji University (LL.B., 1994); The Legal Training and Research Institute of the Supreme Court of Japan; University of Kent (LL.M., 2007).

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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Japan: Labour and employment

Labour and employment ‚Äď Independent local firms

Within: Leading individuals

Kunihiro Sumida (Bengoshi) - Atsumi & Sakai

Within: Labour and employment ‚Äď Independent local firms

Atsumi & Sakai advises on all aspects of employment law including employment agreements, directors’ and officers’ service contracts and work rules. The group has particular expertise in assisting foreign corporations with the issues surrounding the termination of employment in Japan including preparing termination schemes and related disputes. Practice co-head Kunihiro Sumida is a specialist in employment litigation.

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IHL Briefings

If your firm wishes to publish IHL Briefings or articles, please contact Antony Dine on +44 (0) 207 396 9315 or


Japan: Employee Incentives

This country-specific Q&A provides an overview to tax laws and regulations that may occur in  Japan . This Q&A is part of the global guide to Employee Incentives. [Continue Reading]

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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).