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Law firm profile

Momo-o, Matsuo & Namba

Global 2022
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Provided by Momo-o, Matsuo & Namba

Managing Partner: Mr. Junya Naito

Number of partners: 21

Number of lawyers: 56

Languages: English, Japanese and Chinese



Momo-o, Matsuo & Namba (“MMN”) was established in 1989 by

its three name partners, Mr. Shigeaki Momo-o, Mr. Makoto Matsuo and Mr. Shuichi

Namba. The firm is often deemed “truly indispensable” based on its ability to

meet the demands of a very diverse client base operating in an ever-changing

world economy. MMN provides a complete array of corporate and commercial legal

services to its domestic and multinational clients. The firm and its attorneys

have received long-standing recognition for excellence in key practice areas such

as complex litigation and international arbitration, general corporate and

M&A, bankruptcy, antitrust and competition, real estate, labour and

employment, and intellectual property including brand protection.



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


Areas of Practice:


& 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.


& 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.


& Reorganisation:

MMN is renowned for having handled numerous large-scale

corporate reorganization cases. It regularly acts as court-appointed trustees

in bankruptcy and corporate reorganisation cases.


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




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.



MMN's anti-counterfeiting and brand management practice is

globally recognised. It protects famous brand names and enforces trademarks and

copyrights, particularly in the fashion industry, by devising and administering

customised 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.


& 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.


& Arbitration:

MMN's international arbitration practice is globally recognised.

The firm litigates and arbitrates both domestic and international actions

across many industries. The majority of MMN attorneys have extensive experience

handing complex litigation.


& 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.



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.



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.



MMN defends and advises clients with respect to white-collar

crimes under the Companies Act and antitrust and securities laws.

Ranked Offices

Provided by Momo-o, Matsuo & Namba

Japan - Head office

Momo-o, Matsuo & Namba rankings

Global Guide 2022
Dispute Resolution: Domestic
1 Department
1 Ranked Lawyer
Dispute Resolution: Domestic
Dispute Resolution: Domestic
Band 2
Junya Naito
Junya Naito
Band 1