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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

Independent local firms

Within: Independent local firms

Recent highlights for Atsumi & Sakai include representing 62 non-Japanese institutional investors and pension funds in a damages claim arising from the high-profile 2011 Olympus scandal, and acting for CAICA in an investigation by the Securities and Exchange Surveillance Commission (SESC) accusing the client of making false statements in its annual securities reports. Tatsuya Fukui and Toyoki Emoto jointly lead the department, which advises domestic and international clients in litigation, arbitration and mediation. Kunihiro Sumida is recommended for labour disputes, London-based Ryuichi Nozaki handles international litigation, Masataka Hayakawa is the key name for corporate regulatory compliance issues and investigations, and Teruhisa Toyama is experienced in securities litigation.

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Japan: Labour and employment

Independent local firms

Within: Leading individuals: bengoshi

Kunihiro Sumida - Atsumi & Sakai

Within: Independent local firms

Headed by Kunihiro Sumida, Atsumi & Sakai’s team advises domestic and foreign companies on termination schemes in Japan, immigration-related issues and matters arising from cross-border transactions. The practice recently handled cases focusing on the treatment of foreign employees, harassment and pay increases. Tatsuo Yamashima and Bonnie Dixon are also recommended.

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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 (“the Minister”), has published the Criminal Justice Bill 2011 (“the Bill”). The main purpose of the Bill is stated to be “…to 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.”
  • 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).