Admitted
Japan (1977) and New York (1982)
Bar Association
Daini Tokyo Bar Association, New York State Bar Association
Education
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)
Publications
- "Growth Strategy 2017: Fine-tuning Japan's Banking Act for Fintech," Who's Who Legal: Japan 2017, Law Business Research Ltd. (2017) [Co-author]
- Theory and Practice of TMKs- Asset Liquidation Using TMKs, Kinzai Institute for Financial Affairs (2009) [Co-author]
- "Securtisation 2008/09 Country Q&A Japan"PLC Cross-border Handbooks: Finance Volume 2, Practical Law Company (2008) [Co-author]
- "Secured Lending 2008/09 Country Q&A Japan" PLC Cross-border Handbooks: Finance Volume 1, Practical Law Company (2008) [Co-Author]
- "Japan Overview" The Legal Media Group Guide to the World’s Leading Structured Finance and Securitization Lawyers, IFLR (2007) [Co-author]
- "Secured Lending 2007/08 Country Q&A Japan"PLC Cross-border Handbooks, Practical Law Company (2007) [Co-author]
- "Legal Aspects (of aircraft registered in Japan)" Airfinance Annual 2002/2003 [Co-author]
- "Legal Aspects of PFI Financing in Japan" Japan Now Open For Business, The Essential Investment Guide From Asia Law & Practice (1999)
- "A case of securitisation of bank loan assets in U.K.- Structure of Rose Fund" NBL No.618, Shojihomu (1997)
- "Legal Aspects of aircraft registered in Japan" Airfinance Annual 1994/95
- "Opinion on asset-backed CP - Discussion on taxation in connection with securitisation overseas of domestic debt obligations" NBL No. 517, Shojihomu (1993)
- "Relative rules for securitisation in the Cayman Islands" (Translation in Japanese) NBL No. 529, Shojihomu (1993)
- New Amendment Strengthens Shareholder Control" Asia Law (August, 1993)
- "International Banking, Japan" International Financial Law Review, Special Supplement (September, 1992)
Web Articles
- "View From the Top – An interview with Hiroo Atsumi, Senior Partner, Atsumi & Sakai," Top Ranked Legal (October 2024) [Interview]
- "Capacity to Find Solutions to a Wide Range of Complex Issues Borne out of Many Years of Practicing Diversity -Atsumi & Sakai-," Bengo4.com Career (April 2023) [Interview]
Seminars
- "Legal Issues associated with Securing Lease Receivables in Japanese Leveraged Lease Transactions—From the Lenders' Viewpoint", March 14, 1994, organized by the Business Law Institute (Shoji-Homu-Kenkyu-Kai)
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IFLR 1000 2025
Market leader-
Banking
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Capital markets: Structured finance and securitisation
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Legal Icon
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Asset Finance Law
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Banking and Finance Law
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Capital Markets Law
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Project Finance and Development Practice
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Real Estate Law
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Structured Finance Law
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Banking & Finance: Domestic (Senior Statespeople)
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Banking & Finance: Domestic (Senior Statespeople)
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Banking
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IFLR 1000 2024
Leading Lawyers (Market leader)-
Banking
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Capital markets: Structured finance and securitisation
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Legal Icon
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Asset Finance Law
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Banking and Finance Law
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Capital Markets Law
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Project Finance and Development Practice
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Real Estate Law
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Structured Finance Law
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Banking & Finance: Domestic (Senior Statespeople)
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Banking & Finance: Domestic (Senior Statespeople)
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Banking
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asialaw Leading Lawyers 2024
Senior statesman-
Banking and finance
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Capital markets
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IFLR 1000 2023
Leading Lawyers (Market leader)-
Banking
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Capital markets: Structured finance and securitisation
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Asset Finance Law
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Banking and Finance Law
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Capital Markets Law
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Project Finance and Development Practice
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Real Estate Law
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Structured Finance Law
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Banking & Finance: Domestic (Senior Statespeople)
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Banking & Finance: Domestic (Senior Statespeople)
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asialaw Leading Lawyers 2023
Senior statesman-
Banking and finance
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Capital markets
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IFLR1000 32nd edition
Leading Lawyers (Market leader)-
Banking
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Capital markets: Structured finance and securitisation
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Asset Finance Law
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Banking and Finance Law
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Capital Markets Law
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Project Finance and Development Practice
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Real Estate Law
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Structured Finance Law
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Banking & Finance: Domestic (Senior Statespeople)
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Capital Markets: Domestic: Securitisation & Derivatives (Senior Statespeople)
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Banking & Finance: Domestic (Senior Statespeople)
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Capital Markets: Domestic: Securitisation & Derivatives (Senior Statespeople)
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Banking
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asialaw Leading Lawyers 2022
Senior statesman-
Banking and finance
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Capital markets
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Asset Finance Law
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Banking and Finance Law
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Capital Markets Law
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Project Finance and Development Practice
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Real Estate Law
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Structured Finance Law
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Banking & Finance: Domestic (Senior Statespeople)
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Capital Markets: Domestic: Securitisation & Derivatives (Senior Statespeople)
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Banking & Finance: Domestic (Senior Statespeople)
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Capital Markets: Domestic: Securitisation & Derivatives (Senior Statespeople)
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IFLR 1000 Financial and Corporate 2021
Leading Lawyers (Market leader)-
Banking
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Capital markets: Structured finance and securitisation
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Banking
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asialaw Leading Lawyers 2021
Senior statesman-
Banking and finance
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Capital markets
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Banking & Finance: Domestic (Senior Statespeople)
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Capital Markets: Domestic: Securitisation & Derivatives (Senior Statespeople)
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Asset Finance Law
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Banking and Finance Law
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Capital Markets Law
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Real Estate Law
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Structured Finance Law
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Banking & Finance: Domestic (Senior Statespeople)
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Capital Markets: Domestic: Securitisation & Derivatives (Senior Statespeople)
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Banking
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IFLR 1000 Financial and Corporate 2020
Leading Lawyers (Market leader)-
Banking
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Capital markets: Structured finance and securitisation
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asialaw Leading Lawyers 2020
Senior statesman-
Banking and finance
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Capital markets
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Banking
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Structured Finance and Securitisation
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Managing Partner of the Year
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Asset Finance Law
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Banking and Finance Law
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Capital Markets Law
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Real Estate Law
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Structured Finance Law
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Banking & Finance: Domestic (Senior Statespeople)
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Capital Markets: Domestic: Securitisation & Derivatives (Senior Statespeople)
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Banking & Finance: Domestic (Senior Statespeople)
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Capital Markets: Domestic: Securitisation & Derivatives (Senior Statespeople)
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IFLR 1000 Financial and Corporate 2019
Leading Lawyers (Market leader)-
Banking
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Capital markets: Structured finance and securitisation
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Banking
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Structured Finance and Securitisation
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Banking & Finance
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Finalist – Managing Partner of the Year
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Asset Finance Law
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Banking and Finance Law
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Real Estate Law
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Structured Finance Law
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Banking & Finance (Senior Statesmen)
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Capital Markets (Senior Statesmen)
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Banking and Finance
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Banking & Finance (Senior Statesmen)
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Capital Markets (Senior Statesmen)
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IFLR 1000 Financial and Corporate 2018
Leading Lawyers (Market leader)-
Banking
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Capital markets: Structured finance and securitisation
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Banking
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Banking & Finance
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Finalist – Managing Partner of the Year
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Banking & Finance
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Capital Markets (Eminent Practitioner)
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Asset Finance Law
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Banking and Finance Law
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Real Estate Law
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Structured Finance Law
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Banking and Finance
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Structured Finance / Securitisation
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Banking & Finance
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Capital Markets (Eminent Practitioner)
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Banking
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Structured Finance and Securitisation
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Banking
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Capital markets: Structured finance and securitisation
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Asset finance
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Banking & Finance
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Banking
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Finalist – Managing Partner of the Year
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Asset Finance Law
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Banking and Finance Law
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Real Estate Law
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Structured Finance Law
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Banking & Finance
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Capital Markets (Eminent Practitioner)
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Banking & Finance
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Capital Markets (Eminent Practitioner)
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Banking and Finance
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Structured Finance / Securitisation
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Banking
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Capital markets: Structured finance and securitisation
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Banking
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Structured Finance and Securitisation
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Asset Finance Law
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Banking and Finance Law
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Real Estate Law
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Structured Finance Law
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Finalist – Managing Partner of the Year
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Banking & Finance
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Capital Markets
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Banking & Finance
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Capital Markets
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Banking and Finance
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Structured Finance / Securitisation
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Banking
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Capital markets: Structured finance and securitisation
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Banking
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Banking
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Structured Finance and Securitisation
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Asset Finance Law
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Banking and Finance Law
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Real Estate Law
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Structured Finance Law
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Banking
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Capital Markets
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Finalist – Managing Partner of the Year
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Banking & Finance
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Capital Markets
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Banking & Finance
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Capital Markets
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Structured Finance / Securitisation
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Banking and Finance
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Structured finance and securitisation
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Banking and finance
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Banking
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Structured Finance and Securitisation- Japan
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Asset Finance
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Banking and Finance Law
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Structured Finance
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Banking and Finance
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Capital Markets: Securitisation & Structured Finance
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Banking and Finance
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Capital Markets: Securitisation & Structured Finance
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Capital markets: structured finance and securitization
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Banking
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Structured Finance / Securitisation
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Banking and Finance
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Structured Finance
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Banking and Finance
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Capital Markets: Securitisation & Structured Finance
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Asset Finance
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Banking and Finance Law
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Structured Finance
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Banking and Finance
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Capital Markets: Securitisation & Structured Finance
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Structured Finance / Securitisation
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Banking and Finance
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Capital Markets
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Projects and Energy
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Capital Markets: Structured Finance and Securitization
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Banking
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Asialaw Profiles 2011 Leading Lawyers
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Structured Finance
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Corporate INTL 50 BEST Lawyers in Japan 2011
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Capital Markets Law
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Chambers Asia-Pacific 2011 Leading Individual
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Banking and Finance
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Capital Markets: Securitisation & Structured Finance
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PLC Which Lawyer? 2011 Individual Recommendation
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Real Estate: Local Advice
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Banking and Finance: Local Advice
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Capital Markets: Debt and Equity
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Capital Markets: Securitisation
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Lawyer Monthly Leading LAWYER 100 Asia Pacific 2011
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Banking & Finance
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The Legal 500 2011 Leading Individuals
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Securitization
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Banking and Finance
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Projects and Energy
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IFLR1000 2011 Leading Lawyer
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Capital Markets: Structured Finance and Securitization
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Banking
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Asia Law Leading Lawyers — Japan, 2010
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Leading Lawyer — Securitization & Structured Finance
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Best Lawyers 2010 "Best Lawyers"
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Asset Finance
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Banking and Finance Law
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Structured Finance
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Legal Media Guides to the World’s Leading Lawyers 2010
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Structured Finance and Securitization
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Banking
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The Legal 500 2010 Leading Individual
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Banking and Finance
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Projects and Energy
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IFLR1000 2010 Leading Lawyer
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Banking
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Capital Markets — Structured Finance and Securitization
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Asia Law Leading Lawyers—Japan, 2009
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Leading Lawyer—Securitization & Structured Finance
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Best Lawyers 2009 "Best Lawyers"
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Asset Finance
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Banking and Finance Law
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Structured Finance
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IFLR1000 2009 Leading Lawyer
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Banking
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Capital Markets — Structured Finance and Securitization
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Chambers Asia 2009 Leading Individual
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Banking and Finance
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Capital Markets: Securitisation & Structured Finance
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Legal 500 2009 Leading Individual
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Banking and Finance
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Projects
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AsiaLaw Leading Lawyers 2008
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Leading Lawyer — Securitization & Structured Finance
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Chambers Global 2008 Leading Individual
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Banking & Finance
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Capital Markets: Securitisation
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IFLR1000 2008 Leading Individual
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Banking and Finance
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Projects
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Legal Media Guides to the World’s Leading Lawyers 2008
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Securitization & Structured Finance
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Banking
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Project Finance
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PLC Which Lawyer? 2008 Leading Individual
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Banking: Lenders & Borrowers
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AsiaLaw Leading Lawyers 2007 Leading Lawyer
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Securitization & Structured Finance
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Chambers Global 2007 Band 1 Leading Individual
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Banking and Finance
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Capital Markets: Securitisation
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IFLR1000 2007 Leading Individual
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Banking and Finance
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Projects and Energy
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PLC Which Lawyer? 2007 Leading Individual
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Finance: Banking
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PLC Cross Border Finance: Secured Lending 2007/2008
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Leading Individual—Banking
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Recommended Individual—Debt Capital Markets
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AsiaLaw Leading Lawyers 2006 Leading Lawyer
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Securitization & Structured Finance
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Chambers Global 2006 Leading Individual
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Banking and Finance
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Capital
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Markets: Securitisation
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IFLR1000 2006 Leading Individual
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Banking and Finance
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Projects and Energy
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PLC Which Lawyer? 2006
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Leading Individual—Finance: Banking
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Highly Recommended Individual—Corporate Real Estate
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Recommended Individual—Finance: Debt Finance
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