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Atsumi & Sakai

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

Yuko Nihonmatsu

Work +81-(0)3-5501-1146
Atsumi & Sakai

Work Department

General Corporate Law, M&A, Compliance, Venture Capital, Cross-border Transactions, Banking, Asset Finance, Asset Management, Insurance, PFI/Project Finance, Litigation, Regulatory Affairs, International Trade




Mitsui, Yasuda, Wani & Maeda (currently Linklaters Tokyo) (October 2001-September 2004)

Nishimura & Asahi (October 2004-March 2011)

Litigation Department of Tokyo Legal Affairs Bureau, Ministry of Justice (April 2011-March 2013)

Atsumi & Sakai (April 2011- current)


Japanese and English.


Daini Tokyo Bar Association.


Hitotsubashi University (LL.B., 1997)

Southern Methodist University (LL.M., 2009)

The Legal Training and Research Institute of the Supreme Court of Japan

Japan: Projects and energy

Projects and energy – Independent local firms

Within: Projects and energy – Independent local firms

At Atsumi & Sakai, Miho Niunoya and Yuko Nihonmatsu advised the Japan Research Institute and Maebashi City on a PPP project to design, build and operate a roadside station, entertainment and sightseeing facility in Maebashi City. Corporate expert Hiroyuki Sanbe recently acted for the Global Infrastructure Partners in the Japanese law aspects of its takeover of Equis Fund's wind and solar energy portfolio, and Ryosuke Oue aided in the acquisition of shares in large-scale power projects of an electricity company. Other key names include nuclear specialist Simon Bezzina – who advised on the English law aspects of the procurement of nuclear power facilities – Michiaki Hosoi, Junko Ogushi and Yutaka Sakai. Hiroshi Maeda has joined from Nishimura & Asahi.

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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).