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Atsumi & Sakai

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

Kohei Murakawa

Work +81-(0)3-5501-2148
Atsumi & Sakai

Work Department

Antitrust Law, Intellectual Property Law, Litigation, International Arbitration, Risk Management, IT, Data Protection, Pharmaceutical Affairs




Lawyer admitted in Japan (Bengoshi) (2007)
Squire Gaikokuho Kyodo Jigyo Horitsu Jimusho (Tokyo Office of Squire Patton Boggs) (January 2008-July 2017) 
Secondment with Squire Patton Boggs (Singapore) LLP (March 2016-March 2017)
Solicitor admitted in England and Wlaes (2018) *
* Atsumi & Sakai is not regulated by the Solicitors Regulation Authority for England and Wales.


Japanese and English


Dai-ichi Tokyo Bar Association


Tohoku University (LL.B., 2003)
Tohoku University School of Law (J.D.., 2006)
The Legal Training and Research Institute of the Supreme Court of Japan
Nottingham Law School (Graduate Diploma in Law, 2014)
University of Law (London) (Legal Practice Course, 2015)

Japan: Antitrust and competition

Antitrust and competition – Independent local firms

Within: Antitrust and competition – Independent local firms

At Atsumi & Sakai 'the advice hits all the right points to balance competition law and business risks' and 'truly exceptional' practice head Setsuko Yufu is noted for the 'depth of her understanding of Japanese and foreign competition law as well as her excellent relationship with the JFTC'. A team including Saori Hanada and 'up-and-coming star' Masayuki Matsuura is acting for a Japanese manufacturer in the landmark 'autoparts cartel' investigations launched by the JFTC and foreign regulatory bodies. Meanwhile, Tatsuo Yamashima – who is described as 'one of the outstanding antitrust experts in Japan' – is collaborating with Yufu and recently promoted partner Yusuke Miura to defend a major Japanese shipping company in investigations into a host of anticompetitive business practices by the JFTC, DoJ, EU and other entities. The group also advises clients on general compliance matters, internal investigations and merger clearance mandates in the context of M&A transactions. Recent team developments include the arrival of Hisashi Miyatsuka and of counsel Go Fujimoto from Nishimura & Asahi and of counsel Kohei Murakawa from Squire Gaikokuho Kyodo Jigyo Horitsu Jimusho.

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Japan: Risk management and investigations

Risk management and investigations – Independent local firms

Within: Next generation lawyers

Kohei Murakawa - Atsumi & Sakai

Within: Risk management and investigations – Independent local firms

Atsumi & Sakai acts for Japanese and multinational companies operating in Japan on crisis management matters. The business value restoration team focuses on compliance and disclosure, while the white-collar crime group has experience in criminal defence including fraud, forgery, embezzlement, cybercrime, tax evasion, foreign bribes and felony cases. Hiroyuki Nezu jointly leads the team with Masataka Hayakawa, the latter of which focuses on corporate regulatory compliance and investigations, corporate risk and white-collar defence, among others, and  has ‘experience as a prosecutor and an officer at the Ministry of Justice in Japan, which makes his work valuable.’ Also recommended is of counsel Kohei Murakawa, who has ‘distinguished skills in global disputes’ and experience in domestic and international cartel investigations including internal audits and leniency applications.

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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).