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Global Guide
Firm Profile

Momo-o Matsuo & Namba

Firm Profile


  • Profile
  • Kojimachi Diamond Building
  • 4-1 Kojimachi
  • Chiyoda-ku
  • Tokyo
  • Tokyo-to
  • Japan
  • 102-0083

Firm profile submitted by Momo-o Matsuo & Namba

Managing Partner: Mr. Shuichi Namba
Number of partners: 19
Number of lawyers: 38
Languages: Chinese, English, Japanese

Momo-o, Matsuo & Namba (“MMN”) is a full-service corporate law firm renowned for providing indispensable legal services. The legal issues facing its global and local clients are diverse and represent an ever-changing and increasingly integrated world economy. This reality is reflected in its attorneys. Many are internationally-recognised experts in fields such as litigation and arbitration, corporate law and compliance, M&A, antitrust and competition, bankruptcy and reorganisation, intellectual property and labour and employment. Although MMN is a full-service firm, it retains the most positive attributes of a “powerhouse” boutique by providing hands-on, engaged and responsive counseling on a comprehensive range of domestic and cross-border matters. The firm works integrally with its clients throughout the world as the only Japan member of Interlaw, the elite-ranked international network of full-service independent law firms.

Practice Areas:
Antitrust & Competition
Banking & Financial Transactions
Bankruptcy & Reorganisation
Corporate Law & Commercial Transactions
Information Technology
Intellectual Property
Labour & Employment
Litigation & Arbitration
Mergers & Acquisitions
Pharmaceutical Affairs
Real Estate
White-Collar Crime

Antitrust & Competition:
MMN's antitrust practice is globally recognised. It handles investigations on domestic and international cases of alleged violations (administrative and criminal procedures) and associated appeal procedures, as well as attendant civil dispute procedures, often in collaboration and cooperation with specialists in the relevant country. MMN counsels on procedures for merger regulations and handles disputes relating to distribution policies, business collaborations and other business transactions.

Banking & Financial Transactions:
MMN drafts, reviews and provides advice on loan agreements and myriad other financial transactions. It assists in the development of new products for domestic and foreign banks, securities companies and insurance companies operating in the Japanese regulatory environment.

Bankruptcy & Reorganisation:
MMN is renowned for having handled numerous large-scale corporate reorganisation cases. It regularly acts as court-appointed trustees in bankruptcy and corporate reorganisation cases.

Corporate Law & Commercial Transactions:
As one of MMN's core competencies, the firm routinely advises on various aspects of corporate and commercial transactions law. It advises on corporate-compliance matters including the establishment and maintenance of "helplines."

Information Technology:
The firm advises on legal issues and disputes across the IT industry including rights management, business tie-ups, the protection of personal information and legal issues surrounding e-commerce, IP, etc.

MMN is an industry-leader in advising multinational and domestic insurance companies on claims and on the development of new insurance products.

Intellectual Property:
MMN's anti-counterfeiting and brand management practice is globally recognized. It protects famous brand names and enforces trademarks and copyrights, particularly in the fashion industry, by devising and administering customized and comprehensive anti-infringement campaigns. It counsels on IP litigation and other disputes. The firm also advises on various types of licensing agreements for IP, including patent, know-how, trademark and copyright including computer software.

Labour & Employment:
MMN routinely represents the management of multinational and domestic companies on various employment issues including dismissal, sexual harassment, power harassment, transfer, demotion, wage reduction, temporary retirement, collective bargaining, etc.

Litigation & Arbitration:
MMN's international arbitration practice is globally recognized. The firm litigates and arbitrates both domestic and international actions across many industries. The majority of MMN attorneys have extensive experience handing complex litigation.

Mergers & Acquisitions:
MMN is renowned for its M&A practice. It routinely advises on transactions that include conducting legal due diligence and the negotiation and drafting of agreements for transactions relating to M&A, such as mergers, acquisition of stock or assets, stock exchanges, issuances of stock, stock options and other securities.

Pharmaceutical Affairs:
MMN advises its pharmaceutical clients on legal issues pertaining to clinical trials, CRO, licensing, distribution, R&D, collaborations and joint ventures. The firm provides representation in litigation and arbitration on disputes in the pharmaceutical industry.

Real Estate:
The firm counsels on real estate transactions, including sale, purchase and lease agreements, particularly those concerning overseas investments by Japanese individuals and corporations and foreign investments into Japan.

White-Collar Crime:
MMN defends and advises clients with respect to white-collar crimes under the Companies Act and antitrust and securities laws.


  • Kojimachi Diamond Building ,
  • 4-1 Kojimachi,
  • Chiyoda-ku,
  • Tokyo,
  • Tokyo-to
  • Japan
  • 102-0083
  • Tel +813 3288 2080
  • Fax +813 3288 2081
  • Email : [email protected]
  • Website :