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Key contacts
Partner, Patent Attorney: Toyotaka Abe
Quick facts
Year of Establishment

1990

Partners

239

Other qualified practitioners

566

Total number of lawyers

805

Practitioners (worldwide)

67

Languages

Japanese, English, Chinese, French

Network memberships

INTA, AIPPI, APAA, AIPLA, JTA

Key practice areas
Intellectual property
Trade mark
Patent
Trade mark disputes - domestic firms
Trade mark prosecution - domestic firms
Patent prosecution - domestic firms
Patent disputes - domestic firms
IP transactions – domestic firms
Dispute resolution
White collar crime
White collar crime - Domestic firms
Trade mark - domestic firms
Firm overview

TMI Associates has 102 patent and trademark attorneys (benrishi) in addition to 656 attorneys at law (bengoshi). These professionals – together with over 100 paralegals and other support staff members – form a unique organizational structure that enables the firm to respond in a highly effective and efficient manner to the needs of clients across a wide variety of businesses and technologies throughout the world.

History

Since its establishment in 1990, TMI has grown rapidly and achieved its goal of becoming a full-service law firm that consistently provide valuable and comprehensive legal services of the highest calibre. The firm places great importance on exercising unparalleled legal judgement in areas including intellectual property, litigation, general corporate, corporate finance, antitrust and bankruptcy law. Intellectual property – including patents, designs and trademarks – has been an integral part of the firm’s practice since its establishment, and TMI possesses an unrivalled level of experience and achievements in this area.

Collaboration

By leveraging the close collaboration between its patent and trademark attorneys (benrishi) and IP lawyers (bengoshi), TMI offers its clients high-quality IP services that are unlike those of any other international law firm in Japan.

IP team

• 102 patent and trademark attorneys (benrishi),
• 51 electronical and mechanical attorneys,
• 30 chemical, biotechnology and pharmaceutical attorneys
• 28 trademark and design attorneys; and
• 110 IP lawyers (bengoshi).

As one of the ‘Big Five’ law firms in Japan, TMI currently has by far the largest group of benrishi, which supports the reputation of its strong IP practice in all technical fields.

IP practice

TMI’s practice covers all aspects of intellectual property, including patent and trademark prosecution, transactions (e.g., patent sales, acquisitions and licensing), litigation, pre-litigation analysis, invalidation trials and oppositions, freedom-to-operate analysis, due diligence and import suspension at Customs. The firm files approximately 5,100 trademark, 5,000 patent and 650 Design applications, both in Japan and abroad, and over 30 IP lawsuits per year.

Ability to resolve IP disputes

Our strong litigation team is made up of highly experienced IP litigation lawyers and patent/trademark attorneys with a track record of successful cases, including infringement litigation and invalidation proceedings against decisions of the Japan Patent Office. In order to strengthen its litigation practice, TMI has also recruited lawyers who were previously prominent judges, including former Supreme Court judges and a former presiding judge of the Intellectual Property High Court division.

High-quality services in related areas

• Anti-counterfeiting projects involving civil, criminal and customs procedures to prevent importation of counterfeit products
• Copyright
• Entertainment and sports law
• Protection of know-how and trade secrets
• Prevention against unfair competition
• Contract drafting
• Resolution of disputes arising from IP licensing agreements
• IP due diligence upon acquisition, merger or listing on the stock exchange
• Financing collateralized with IP rights

Practice Areas & Sector Specialisations

Key practice areas: 

Copyright & related rights, Designs, Intellectual property (contentious), Intellectual property (prosecution), ITC litigation, Life sciences IP, Patent (contentious), IP transactions, Patent, Patent (prosecution), PTAB litigation, Trade mark, Trade mark (prosecution), Trade mark (contentious)

Sector expertise: 

Advertising, Aerospace, Agriculture, Artificial intelligence, Biotechnology, Arts, Chemical, Automotive, Computer technology & services, Construction and materials, Defence, Banking, E-commerce, Electrical, Electronics, Fashion & luxury goods, Energy, Film, FMCG, Food and beverage, Financial services, Furniture, Hospitality & leisure, Instruments, ICT & software, Insurance, Logistics, Internet, Manufacturing, Gaming, Industrials, Life sciences, Mechanical, Media, Medical device, Mining, Music, Nanotechnology, Not-for-profit, Oil and gas, Pharmaceutical, Optics & photonics, Professional services, Real estate, Renewable energy, Publishing, Retail,, Semiconductors, Sports, Robotics, Technology hardware, Telecommunication, Tobacco, Universities & research, Utilities

Address:
23rd Floor, Roppongi Hills Mori Tower, 6-10-1 Roppongi Minato-ku
Tokyo, 106-6123
Tel:+810364385611 Fax:+81364385622 Email:Contact Us Web Address:https://www.tmi.gr.jp/

IPS Sponsored

2026 Edition
Copyright - domestic firms
Tier 1
6 firms ranked
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Tier 1

Kotto Dori Law Office
3 practice areas
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TMI Associates
12 practice areas
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Tier 2

Anderson Mori & Tomotsune
10 practice areas
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Nakamura & Partners
4 practice areas
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Nishimura & Asahi
11 practice areas
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Tier 3

Shusaku Yamamoto
8 practice areas
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IP transactions – domestic firms
Recommended
6 firms ranked
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Recommended

Anderson Mori & Tomotsune
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Oh-Ebashi LPC & Partners
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TMI Associates
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Patent disputes - domestic firms
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13 firms ranked
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Tier 1

Abe Ikubo & Katayama
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Anderson Mori & Tomotsune
10 practice areas
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Nakamura & Partners
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TMI Associates
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Tier 2

Kubota
8 practice areas
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Yuasa and Hara
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Tier 3

Nagashima Ohno & Tsunematsu
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Ohno & Partners
7 practice areas
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Tier 2

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Tier 3

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Trade mark - domestic firms
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Nakamura & Partners
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Tier 2

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Tier 3

Aoyama & Partners
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Other Notable Firms

Asamura IP
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Overview

TMI Associates is one of the leading law firms in Japan. The team, supported by lawyers and patent attorneys, is well-experienced in handling IP disputes. In addition to legal services, the firm is recommended for its high capacity for non-contentious matters. The prosecution team can handle all kinds of inventions with its knowledgeable patent attorneys in various technological fields, including electronics, life sciences, and machinery. 

Notable IP practitioners: Yoshiyuki Inaba, Hiroshi Nemoto, Makoto Okada 

Testimonials

2026

"TMI Associates has a highly sophisticated IP litigation team with deep insight into Japanese court practice and procedures. The team is especially strong in handling technically complex patent disputes and trademark conflicts involving domestic and international parties. What distinguishes TMI is their ability to combine rigorous legal analysis with strong procedural strategy, ensuring that cases are managed efficiently and effectively."

"TMI’s prosecution and filing team demonstrates exceptional precision and consistency in managing IP portfolios in Japan. They have a thorough understanding of JPO practice and provide high-quality drafting, prosecution and portfolio management services. Their advice is clear and practical, helping clients avoid common pitfalls in Japanese patent and trademark filings."

"TMI provides well-rounded and commercially grounded IP advisory services. The team takes time to understand each client’s business model, technology and market goals, enabling them to provide tailored strategic advice. Their guidance on enforcement, licensing, compliance, and dispute prevention is insightful and actionable."

"The quality of the work is excellent. They are professional and fast, too."

"Incredibly good advice and consistent updates on evolving case law. Always practical, strategic thinking."

"Great work and client service. Practical recommendations and explains clearly strategy recommendations for US audience. "

Toyotaka Abe

"Responsive and very good with patent strategy in Japan and also advising us when challenging issues arise. He is our go to lawyer in Japan and has been incredibly valuable to us over the years."

Yoshiyuki Inaba

"Yoshiyuki Inaba is an outstanding patent practitioner with deep technical knowledge and a strong command of Japanese and international patent law. He demonstrates exceptional skill in patent prosecution, invalidation proceedings, and strategic portfolio management, particularly in technology-driven industries. He is highly effective at translating complex technical concepts into clear legal strategies and provides practical, commercially grounded advice."

Shunji Sato

"Excellent advisor. Understands business well."

 

2025

“Their professionalism and ability to communicate effectively in both English and Japanese were key factors in our decision."

“Their team is knowledgeable and efficient, ensuring smooth and effective communication. We and our clients are very satisfied with their service."

"They are responsive and excellent at their work."

"We appreciate TMI Associates' professionalism and their ability to respond quickly to our inquiries.”

"We chose TMI Associates for their outstanding reputation in IP law and their proven track record in Japan.”

Linked Reviews
Patent

Case studies show patent litigation, prosecution, licensing, and conflict negotiations work for various high-profile clients. 

Trade mark

Case studies show the firm has handled various trade mark work for clients in a range of sectors. Work includes assisting clients in enforcement, legal assessment of trade mark infringement risk, litigation, and filing matters. 

IP transactions – domestic firms

Case studies show the firm assisted global clients from various sectors in several licensing matters. 

6 results6 results
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