Firm Profile > Nagashima Ohno & Tsunematsu > Tokyo, Japan

Nagashima Ohno & Tsunematsu
TOKYO 100-7036

Antitrust and competition: Independent local firms Tier 1

Nagashima Ohno & Tsunematsu is known for its international cartel work and strong consultation practice. The firm also has experience in merger control and antitrust mandates. Former deputy director of the Fair Trade Commission Eriko Watanabe leads the practice and can call on the expertise of Kaoru Hattori, who is non-governmental advisor member of the JFTC, as well as Yoshitoshi Imoto, who focuses on merger cases and complex antitrust government investigations, as well as the compliance matters for domestic and international companies. Also notable is Ryohei Tanaka, who represents multinational firms and Japanese corporations in merger control proceedings before the JFTC.

Practice head(s):

Eriko Watanabe


‘A very responsive and knowledgeable team in competition law practice area.’

Banking and finance: Independent local firms Tier 1

Nagashima Ohno & Tsunematsu has experience in loans and other credit-related transactions, including syndicated and non-recourse loans, derivatives and foreign trades financing. The firm also provides an active real estate finance practice, as well as expertise in sophisticated securitisation projects. Fumihide Sugimoto leads the banking and finance practice and particularly focuses on capital markets. Notable in his team is finance specialist Jiro Mikami and Mami Ikebukuro, who is known for real estate finance. Hironori Matsuo, Yoshifumi Shimoda, and Tomohiro Okawa were promoted to partner in 2019.

Practice head(s):

Fumihide Sugimoto


‘Very good quality of service’

‘Kensuke Suzuki is one of the best lawyer who covers asset management industry in Japan’

Key clients

Mitsubishi UFJ Financial Group, Inc. (including MUFG Bank, Ltd., Mitsubishi UFJ Trust and Banking Corporation and Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.)

Mizuho Financial Group, Inc. (including Mizuho Bank, Ltd., Mizuho Trust & Banking Co., Ltd. and Mizuho Securities Co., Ltd.)

Sumitomo Mitsui Financial Group, Inc. (including Sumitomo Mitsui Banking Corporation and SMBC Nikko Securities Inc.)

Sumitomo Mitsui Trust Holdings, Inc. (including Sumitomo Mitsui Trust Bank, Limited)

Shinsei Bank, Limited

Goldman Sachs

Morgan Stanley

Nomura Securities Co., Ltd

Daiwa Securities

JP Morgan

Development Bank of Japan

Capital markets: Independent local firms Tier 1

Nagashima Ohno & Tsunematsu is known for advising on global offerings by Japanese issuers of equity and debt securities, global and domestic IPOs, Japanese offerings by foreign issuers, and J-RIET transactions. The firm also has a strong securitisation team that is particularly experienced in complex and innovative transactions. Fumihide Sugimoto leads the practice that includes capital markets specialist Miyuki Ishiguro and Motohiro Yanagawa, who has expertise in structured finance and securitization. In recent highlights, the team acted for Sumitomo Mitsui Financial Group in the issuance of TLAC Compliant Senior Notes and advised Goldman Sachs International and J.P. Morgan Securities plc, as managers, in Altaba Inc.’s sale of its entire stake in Yahoo Japan Corp. to a number of overseas investors through Accelerated Bookbuilt Offering.

Practice head(s):

Fumihide Sugimoto


‘Exceptional knowledge’

‘Quick response and reasonable fee’

‘Very satisfactory with services’

‘Motohiro Yanagawa is recommended’ 

Key clients

Mitsubishi UFJ Financial Group, Inc.

Mizuho Financial Group, Inc.

Sumitomo Mitsui Financial Group

Sumitomo Mitsui Trust Holdings, Inc.

Shinsei Bank, Limited

Goldman Sachs

Morgan Stanley

Bank of America Merrill Lynch

Nomura Securities Co., Ltd.

JP Morgan

Daiwa Securities Co. Ltd.

Development Bank of Japan

Corporate and M&A: Independent local firms Tier 1

Specialising in M&A, Nagashima Ohno & Tsunematsu has an extensive overseas network and acts in a range of cross-border transactions for listed companies in Japan, as well as multinational companies. The firm has particular experience in the sectors of technology, financial institutions, energy, infrastructure, consumer goods, pharmaceuticals and real estate. Practice head Kenichi Fujinawa focuses on M&A, corporate governance, crisis management and compliance. His team includes Shuichi Nishimura, who is known for M&A, general corporate and private equity/venture capital work, and corporate law and M&A specialist Yuko Tamai. Also notable is Keiji Tokujiya, who was promoted to partner in 2019. The team acted as Japanese counsel to Shire in Takeda’s acquisition of the company, providing advice on complex corporate, securities and tax regulations. The department also provided Japanese law advice regarding the drafting of pertinent transaction documents as well as antitrust matters.

Practice head(s):

Kenichi Fujinawa

Other key lawyers:

Key clients

Bain Capital

Panasonic Corporation


The Coca-Cola Company and Coca-Cola Japan


Calsonic Kansei Corporation


General Electric Company

Komatsu Ltd.


Lawson, Inc.

Nippon Yusen Kabushiki Kaisha

Takata Corporation

Kirin Holdings Company, Limited

Sumitomo Heavy Industries, Ltd.

Nippon Express Co., Ltd.

Sumitomo Mitsui Banking Corporation

TEPCO Fuel & Power, Incorporated

Calsonic Kansei Corporation

Dispute resolution: Independent local firms Tier 1

Representing domestic and international businesses, Nagashima Ohno & Tsunematsu has notable experience in Japanese courts as well as in arbitration and mediation proceedings. The practice acts in disputes arising in multiple jurisdictions and draws from multidisciplinary expertise across the firm, including commercial transaction, IP, antitrust, employment, and construction. Norimitsu Arai leads the team and has broad experience acting for domestic and foreign clients in local court. Also notable are Hisaya Kimura, who specialises in cross-border and domestic dispute resolution, and Yoshimi Ohara, who represents clients in international arbitrations under ICSID, SIAC, ICC, AAA/ICDR and JCAA rules.

Practice head(s):

Norimitsu Arai

Other key lawyers:


‘Concise team, reasonable fees and can handle requests fast and quickly’

‘Very sophisticated lawyers, excellent judgment, extraordinary attention to detail and knowledge of US legal system’

‘The ability of total coordination is the most important’

‘Hisaya Kimura is an excellent practitioner. He is definitely a stand-out partner with excellent technical skills’

‘Mr. Yanagisawa can quickly see potential risks involving each selection of wordings’

‘Mr. Hirai is flexible but deep detail oriented’

Key clients

Nissan Motor Co., Ltd.

Central Japan Railway Company

Tokyo Electric Power Company

Merrill Lynch International, Merrill Lynch Japan Securities Co., Ltd.

Mitsubishi UFJ Trust and Banking Corporation

Kajima Corporation

SECOM Co., Ltd.

Resona Bank, Limited

IBM Corporation

Samsung Electronics Co., Ltd.

Intellectual property: Independent local firms Tier 1

The broad practice of Nagashima Ohno & Tsunematsu covers IP litigation and transactional matters, including due diligence, licensing, M&A, and IP finance. The firm has particular expertise in the areas of pharma and technology. Notable in the practice are Shunji Matsuda and former IP High Court judge Ryoichi Mimura. In a recent highlight, the team successfully represented Nintendo in litigation filed with the Tokyo District Court against Maricar for the use of Nintendo characters in its business. The court ruled that the defendant must stop such activities, constituting unfair competition.

Other key lawyers:

Key clients

Nintendo Co., Ltd.

Nichia Corporation


Nippon Hoso Kyokai (Japan Broadcasting Corporation)

Pioneer Corporation.

Ryohin Keikaku Co.,Ltd. (i.e., MUJI) (

Investment funds: Independent local firms Tier 1

The multi-disciplinary team at Nagashima Ohno & Tsunematsu is known for private equity expertise and its broad practice in fund formation. The firm provides a strong real estate funds team, advising on private REITS, private real estate funds, and JREITs. The department also assists onshore and offshore fund sponsors in structuring and forming the funds, as well as representing asset management companies in structuring and formation of investment funds. Hidetaka Mihara leads a team that includes Keiko Shimizu, who has particular expertise in structuring and advising on complex, cross-border fund projects.

Practice head(s):

Hidetaka Mihara

Other key lawyers:


‘The team understands the Japanese real estate fund market and the local standards very well’ 

‘They are good at working with US counsel on cross-border matters – Japan transactions’

‘Mami Ikebukuro and Keiko Shimizu both stand out for their knowledge of the Japanese real estate fund market and the expectations of Japanese fund investors. They both also speak English well and are familiar with US practices’

Labour and employment: Independent local firms Tier 1

Nagashima Ohno & Tsunematsu is known for representing the management of foreign and domestic companies, across a range of industries, in employment and labour law disputes. The practice has particular experience advising international business entities and their Japanese affiliates in large-scale commercial litigation and in handling corporate law matters related to employment. Areas of expertise include employee contracts and work rules; employment-related regulatory compliance; contracts for executives and executive compensation; collective bargaining negotiations with labour unions; and protection of personal information. In addition, the practice advises clients on employment and labour law issues arising from the restructuring of corporate entities and M&A. Hisaya Kimura leads a team that includes Norimitsu Arai, who is notable for union-related work, litigation, and transactional employment matters.

Practice head(s):

Hisaya Kimura

Other key lawyers:

Private wealth: Independent local firms Tier 1

Full-service firm Nagashima Ohno & Tsunematsu is particularly strong in structured finance, trusts, and taxation, providing advice to high-net-worth individuals from both legal and taxation perspectives. Notable in the area are former judge Masato Tanaka, who specialises in advising private clients on the legal, strategic, and business side of matters; trusts and inheritance expert Masayuki Fukuda; Shigeki Minami, who has expertise in M&A and tax; and Yushi Hegawa, who focuses on tax advice.

Projects and energy: Independent local firms Tier 1

Specialising in cross-border energy and infrastructure transactions, Nagashima Ohno & Tsunematsu has experience in renewables, mega-solar, and offshore wind projects, as well as replacement and harbour-related work. In addition, the practice provides expertise in electric and gas sales regulation, advising a range of power utility companies, trading companies, and investors. M&A and real estate specialist Shunpei Tanaka co-leads the practice with Jiro Mikami, who is known for project finance matters, particularly in relation to energy and natural resources projects. Also notable in the team are Takao Higuchi, who has particular experience in energy and infrastructure, including PFI and PPP; Kiyoshi Honda, who focuses on infrastructure and natural resource projects, especially renewable energy; and Yoshifumi Shimoda, who was promoted to partner in 2019 and is experienced in project finance.

Practice head(s):

Shunpei Tanaka; Jiro Mikami

Key clients

Development Bank of Japan Inc.

Mizuho Bank, Ltd.

Tokyo Electric Power Company Holdings, Inc.

The Tokyo Electric Generation Company, Incorporated.

TEPCO Power Grid, Incorporated

JERA Co., Inc.

Tokyo Electric Power Company Group

Sumitomo Mistui Trust Bank, Limited.

Real estate and construction: Independent local firms Tier 1

Known for its strong J-REIT practice, Nagashima Ohno & Tsunematsu is experienced representing overseas parties in cross-border investment, notably in the niche area of J-REIT investment abroad. The firm’s real estate group provides a range of expertise, including in development, construction, acquisition and disposal, management, and leasing. In addition, the practice acts in finance transactions by domestic and foreign investors, as well as dispute resolution proceedings related to real estate matters. Transactional specialist Shunpei Tanaka leads the team and is known for advising clients on development and large restructuring projects. Also notable in the area are Mami Ikebukuro, who has particular expertise in tax-related issues; Hiroto Inoue, who focuses on real estate funds, financing,  securitisation, and J-REIT formation; Shinichiro Horaguchi is experienced in domestic real estate transactions and overseas development projects.

Practice head(s):

Shunpei Tanaka

Key clients

Mitsui Fudosan Co., Ltd. (and its group companies such as investment management subsidiaries and sponsored J-REITs)

MITSUBISHI ESTATE CO., LTD. (and its group companies such as investment management subsidiaries and sponsored J-REITs)

Tokyu Land Corporation (and its group companies such as investment management subsidiaries and sponsored J-REITs)

Sumitomo Realty & Development Co., Ltd. (and its group companies such as investment management subsidiaries and sponsored J-REITs)

Nomura Real Estate Development Co., Ltd. (and its group companies such as investment management subsidiaries and sponsored J-REITs)

Mitsubishi Corporation (and its group companies such as investment management subsidiaries and sponsored J-REITs)

Hulic Co., Ltd. (and its group companies such as investment management subsidiaries and sponsored J-REITs)

ORIX CORPORATION  (and its group companies such as investment management subsidiaries and sponsored J-REITs)




Restructuring and insolvency: Independent local firms Tier 1

The multidisciplinary team at Nagashima Ohno & Tsunematsu specialises in cross-border cases, acting for listed companies in capital markets and M&A related matters. The firm provides a strong compliance team, as well as experience in out-of-court workouts. Nobuaki Kobayashi leads the team and has experience handling high-profile insolvency and restructuring proceedings, including large-scale corporate reorganizations. His team includes Yosuke Kanegae, who has expertise acting in listed companies restructuring cases; and cross-border restructuring specialist Tomohiro Okawa, who was promoted to partner in 2019.

Practice head(s):

Nobuaki Kobayashi

Other key lawyers:


‘The team is strong in cross-border insolvency issues and in big insolvency cases’

‘The team has good practical knowledge and experience in cross-border insolvency matters and works very diligently’ 

‘It is one of the best teams in Japan’

‘Tomohiro Okawa is fluent in English and familiar with US bankruptcy law’

‘Kobayashi Nobuaki is a well known practitioners in area of insolvency-related financing law matters’

‘Yosuke Kanegae is a highly reliable attorney, having good mastery of cross-border insolvency practice in Japan’

Key clients

Pioneer Corporation


Akebono Brake Industry Co., Ltd.

Mitsubishi Corporation

Toshiba Corporation

Bain Capital

Otsuka Kagu Ltd.

Risk management and investigations: Independent local firms Tier 1

Nagashima Ohno & Tsunematsu's compliance and crisis management team acts in high-profile corporate regulatory and compliance cases, related to the Japanese market and Japanese corporations. The firm is known for handling matters with a cross-border element, as well as cases arising from the pharmaceutical and environment sectors. The practice is co-led by Hideaki Kobayashi, who focuses on white-collar defence, third party investigations and media strategy; Takayoshi Tao, who has particular expertise in financial and securities regulations, accounting fraud and third party investigations; and Akihisa Shiozaki, who specialises in cross border disputes, regulatory investigations and media strategy. Also notable is Yoshihiko Matake, who advises domestic and multi-national clients on corporate crisis management and regulatory matters. He was promoted to partner in 2019 along with Daisuke Fukamizu, who specialises in white-collar crime, regulatory compliance, antitrust and corporate crisis management.

Practice head(s):

Hideaki Kobayashi; Takayoshi Tao; Akihisa Shiozaki

Key clients

Takata Corporation (Long term client)

Novartis Pharma (Long term client)

SUBARU (Long term client)


Kubota Corporation

Kobe Steel, Ltd.

Tax: Independent local firms Tier 1

The ‘knowledgeable and professional’ tax practice at Nagashima Ohno & Tsunematsu is known for acting in high-profile tax litigation matters. The group contains dedicated tax lawyers, including practice head Atsushi Fujieda and the ‘trustworthy and experiencedYushi Hegawa. The team also boasts a former director-general of the Tokyo Regional Taxation Bureau as a full-time special counsel, Mamoru Toba, and the highly regarded Japanese tax law expert Hiroshi Kaneko as an advisor.

Practice head(s):

Atsushi Fujieda


‘Excellent communication’

‘Answers each question in depth and in a timely manner’

‘Makes excellent practical suggestions when difficulties arise’

‘The most reliable tax law firm in Japan’

‘Yushi Hegawa is outstanding in terms of the accuracy of his advice and creativity for approaching unseen issues’

‘Yushi Hegawa is a technical and swiftly responding tax practitioner who knows his stuff on Japanese taxation’

Key clients

Johnson Controls


UBS Securities

Mitsubishi Corporation

Veoneer Inc.

TMT: Independent local firms Tier 2

Specialising in fintech and data protection, Nagashima Ohno & Tsunematsu also advises in the area of IT, internet, broadcasting, and telecommunication business. The firm provides corporate, M&A, finance, and dispute resolution expertise, particularly for web-based services companies. Soichiro Fujiwara leads the team and is known for representing international and domestic clients in the areas of software, web service, online game, and telecoms services.

Practice head(s):

Soichiro Fujiwara

Key clients


Broadridge Financial Solutions

Fuji Media Holdings, Inc.

Komatsu, Ltd.

Toyota Motor Corporation


The firm

Nagashima Ohno & Tsunematsu is the first integrated full-service law firm in Japan and one of the foremost providers of international and commercial legal services based in Tokyo. In representing its leading domestic and international clients, the firm has successfully structured and negotiated many of the largest and most significant corporate, finance and real estate transactions related to Japan. The firm has extensive corporate and litigation capabilities spanning key commercial areas such as antitrust, intellectual property, labour and taxation. It is known for path-breaking domestic and cross-border risk management/corporate governance cases, such as fraud investigations and white-collar criminal defence, and for handling insolvency and restructuring proceedings including large-scale corporate reorganisations. In order to deliver optimal service and value to its clients, the approximately 500 lawyers of the firm, including over 30 experienced foreign attorneys from various jurisdictions, work together in customised teams to provide the expertise and experience specifically required for each client matter.

The firm has a vast network of relationships with foreign companies and law firms that provides it with a unique perspective when representing clients in international deals. Its overseas network includes offices in New York, Singapore, Bangkok, Ho Chi Minh City, Hanoi and Shanghai, associated local law firms in Jakarta and Beijing, where its lawyers are on-site, and collaborative relationships with prominent local law firms throughout Asia and other regions. The firm regularly handles and coordinates matters involving complex legal issues in a number of Asian jurisdictions. As a pioneering Japanese law firm that has established its presence in New York, the firm’s activities in the United States and throughout the Americas and Europe are expanding rapidly. The firm strives to meet the needs of both its international clients operating in Japan and Asia and its domestic clients operating outside Japan or seeking to expand their operations overseas.

Areas of practice

Nagashima Ohno & Tsunematsu provides a full range of legal services, including advice, research and representation in connection with litigation, contract drafting and negotiation, administrative proceedings, arbitration and mediation. The firm’s fields of practice encompass virtually all areas of law, including, but not limited to: corporate/M&A (general corporate, corporate governance, mergers and acquisitions (M&A), private equity/venture capital); finance (capital markets, banking financial regulations/financial compliance, asset management/fund, securitisation/structured finance/trust, acquisition finance, project finance, insurance); risk and crisis management/compliance; restructuring/insolvency; dispute resolution (basic and complex business litigation cutting across a broad range of legal areas and industry segments in domestic and foreign jurisdictions, international arbitration); labour and employment (employment law advice, employment disputes); real estate and J-REITs (real estate transactions, real estate investment/real estate securitisation, J-REITs); intellectual property (IP transactions, IP disputes); antitrust/competition (antitrust/competition law advice, antitrust litigation/investigation, merger control, unreasonable premiums and misleading representation prevention act and subcontract act); tax (tax advice and planning, tax disputes); other practice areas (environment, consumer affairs, data protection and privacy, wealth management/business succession/inheritance, IT and telecommunications, media, entertainment and sport, construction and infrastructure, natural resources and energy, pharmaceutical and health care); and overseas practice (Asia, Europe, North and Latin America, Africa).


Department Name Email Telephone
Photo Name Position Profile
Mr Kei Asatsuma  photo Mr Kei Asatsuma Partner. His practice focuses on complex business transactions, including M&A, divestitures, spin-offs,…
Mr Hiroshi Fujiwara  photo Mr Hiroshi Fujiwara Partner
Mr Daisuke Fukamizu  photo Mr Daisuke Fukamizu Partner
 Kosuke Hamaguchi  photo Kosuke Hamaguchi General Corporate, Corporate Governance, Mergers and Acquisitions (M&A), Risk and Crisis Management/Compliance,…
 Kaoru Hattori photo Kaoru Hattori Antitrust/Competition Law Advice, Antitrust Litigation/Investigation, Merger Control, Unreasonable Premiums and Misleading Representation…
Mr Takao Higuchi  photo Mr Takao Higuchi Main area of practice is banking, energy, infrastructure and other projects (including…
Mr Rintaro Hirano  photo Mr Rintaro Hirano Partner
Mr Shinsuke Hiratsu  photo Mr Shinsuke Hiratsu Partner
Mr Shinichiro Horaguchi  photo Mr Shinichiro Horaguchi Partner
Ms Mami Ikebukuro  photo Ms Mami Ikebukuro Partner
Mr Hiroki Inoue  photo Mr Hiroki Inoue M&A, including public tender offers, LBO/MBO, joint ventures, general corporate work, and…
Mr Hiroyuki Ishizuka  photo Mr Hiroyuki Ishizuka Main area of practice are financing/capital market transactions and corporate law, including…
Mr Yosuke Kanegae  photo Mr Yosuke Kanegae Yosuke Kanegae has been involved principally in the area of Restructuring/Insolvency, Mergers…
Mr Nobuaki Kobayashi  photo Mr Nobuaki Kobayashi Mr. Kobayashi has a wealth of practical experience handling high-profile insolvency and…
Mr Yoshihiko Matake  photo Mr Yoshihiko Matake Partner. His main area of practice is corporate crisis management, international dispute…
Mr Shinichi Matsui  photo Mr Shinichi Matsui General Corporate; Corporate Governance; Banking; Project Finance; Insurance; Risk and Crisis Management/Compliance;…
Mr Masahiro Matsuoka  photo Mr Masahiro Matsuoka
Mr Hiroshi Mitoma  photo Mr Hiroshi Mitoma His practice focuses on M&A and corporate transactions, including rehabilitation of financially…
Mr Oki Mori  photo Mr Oki Mori Dispute Resolution (Consumer Litigation, Civil and Commercial Disputes, Employment Disputes, Tax Disputes,…
Mr Satoshi Moriguchi  photo Mr Satoshi Moriguchi Asia, China, North America and Latin America, General Corporate, Corporate Governance, Mergers…
Mr Tohru Nakajima  photo Mr Tohru Nakajima General Corporate, Mergers and Acquisitions (M&A), Private Equity/Venture Capital, IP Transactions, Pharmaceutical and…
Ms Yoshimi Ohara  photo Ms Yoshimi Ohara Partner
Mr Ryo Okubo  photo Mr Ryo Okubo Private Equity, M&A, Acquisition Finance, Corporate, TMT, Space
Mr Makoto Saito  photo Mr Makoto Saito Corporate/M&A; General Corporate; Mergers and Acquisitions (M&A); Private Equity/Venture Capital; Securitization/Structured Finance/Trust;…
Mr Tsuyoshi Shimizu  photo Mr Tsuyoshi Shimizu General Corporate; Mergers and Acquisitions (M&A); Corporate Governance; Internal Control/Compliance; Risk and Crisis…
Mr Akihisa Shiozaki  photo Mr Akihisa Shiozaki Partner
Mr Yoshikazu Sugino  photo Mr Yoshikazu Sugino General Corporate, Mergers and Acquisitions (M&A), Private Equity/Venture Capital, Securitization/Structured Finance/Trust, Employment…
Ms Akemi Suzuki  photo Ms Akemi Suzuki Partner
Mr Shunpei Tanaka  photo Mr Shunpei Tanaka Real Estate and J-REITs; Infrastructure; General Corporate (including corporate governance, compliance); Mergers…
Mr Keiji Tonomura  photo Mr Keiji Tonomura Mergers and Acquisitions (M&A); IP Transactions; IT and Telecommunications; Media, Game, Entertainment…
Mr Taku Umezawa  photo Mr Taku Umezawa Financial Regulations (Banking Act, Financial Instruments and Exchange Act, Insurance Business Act)
Ms Eriko Watanabe  photo Ms Eriko Watanabe
Mr Koki Yanagisawa  photo Mr Koki Yanagisawa Dispute Resolution; Employment and Labor Practice; Antitrust Practice; General Corporate; Risk and…
Number of lawyers : 476
Contacts : Motohiro Yanagawa (Tokyo Bar Association)
Contacts : Shinichi Araki (Dai-ichi Tokyo Bar Association)
Contacts : Akihisa Shiozaki (Dai-ichi Tokyo Bar Association)