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Atsumi & Sakai

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

Miho Niunoya

Work +81-(0)3-5501-1163
Atsumi & Sakai

Work Department

Corporate PG (Project/Renewable Energy), Finance PG/Finance, International PG.


Senior Partner (Private Public Partnerships (PPP), Project Finance, Renewable Energy, Construction).


Tokyo Aoyama Aoki Law Office (April 1993 – June 1996, and July 1998 – October 2002; December 2000 – October 2002 as partner) Baker & McKenzie (Jakarta) (July – December 1997) Baker & McKenzie (Singapore) (January – June 1998).


Japanese and English.


Tokyo Bar Association, Japan Association of the Law of Finance, Environmental Committee of Tokyo Bar Association, Association of Japanese Consulting Engineers.


Hitotsubashi University (LL.B., 1991); The Legal Training and Research Institute of the Supreme Court of Japan; Northwestern University School of Law (LL.M., 1997).

Japan: Corporate and M&A

Corporate and M&A – Independent local firms

Within: Corporate and M&A – 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: Projects and energy

Projects and energy – Independent local firms

Within: Leading individuals

Miho Niunoya (Bengoshi) - Atsumi & Sakai

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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Japan: Real estate and construction

Real estate and construction – Independent local firms

Within: Leading individuals

Miho Niunoya (Bengoshi) - Atsumi & Sakai

Within: Real estate and construction – Independent local firms

Atsumi & Sakai's client roster includes global investment banks, major real estate developers, J-REITs and asset managers. The group is particularly strong in structured finance and securitisation transactions but covers the full spectrum of real estate transactions and development mandates. Russell Kawahara – who jointly leads the team alongside Miho Niunoya – recently represented a private fund in the sale of six high-class office buildings in Japan, and acted for a foreign fund in its acquisition of a portfolio of Japanese logistics facilities. A team including Shuji Koyama assisted a private company as part of a consortium with the outsourcing of the entire operations of a sewage system as part of a new PPP model, which includes the construction and maintenance of new facilities. The group also collaborated with the projects and energy department's Miki Ono to oversee the localisation of a foreign standard form construction contract related to the construction of several projects in Japan. Also noteworthy is Eiichiro Hata who specialises in the banking and financing aspects of the practice.

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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).