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Atsumi & Sakai

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

Hiroo Atsumi

Work +81-(0)3-5501-2120
Atsumi & Sakai

Work Department

Finance, Real Estate, Corporate, Litigation/Insolvency, Fund, International Practice.


Senior Partner (Banking, Structured Finance, International Finance, and Other General Corporate Legal Matters).


Senior Partner at Atsumi & Sakai - 1994 to current (Firm was established as Atsumi & Usui in 1994 and renamed Atsumi & Partners in 2003, Atsumi & Sakai in 2010); Partner at Blakemore & Mitsuki - 1990 to 1994; Partner at Tanaka & Takahashi Law Office - 1983 to 1990.


Japanese and English.


Daini Tokyo Bar Association.


The University of Tokyo (LL.B., 1974); The Legal Training and Research Institute of the Supreme Court of Japan; New York University School of Law (M.C.J., 1981).

Japan: Banking and finance

Independent local firms

Within: Leading individuals: bengoshi

Hiroo Atsumi - Atsumi & Sakai

Within: Independent local firms

At Atsumi & Sakai, the ‘excellent’ group acts for major banks and securities companies, listed corporates, ECAs and technology businesses at a domestic and international level. Hiroo Atsumi heads up the practice, Yutaka Sakai is the key name for project finance matters, Hiroyuki Nezu regularly handles asset-based lending issues, Keita Imaizumi acts on cross-border financings, and Michiaki Hosoi advises on energy projects. The firm also fields a fintech team, which is led by Yuri Suzuki and includes Takafumi Ochiai.

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Japan: Capital markets

Independent local firms

Within: Independent local firms

Atsumi & Sakai is highly regarded for its strength in securitisation, and regularly acts for arrangers, investors and trust banks in a range of structured finance transactions. Managing partner Hiroo Atsumi, Toyoki Emoto and Yuri Suzuki are core members of the team. Other names to note include London-based Ryuichi Nozaki, who regularly acts for Japanese financial institutions; securitisation specialist Fumiko Oikawa; Reiko Yoshida, who handles ship financings; and Yasuhiro Shimada, who is recommended for real estate finance mandates.

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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
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