Firm Profile > SUGIMURA & Partners > Tokyo, Japan

SUGIMURA & Partners
TOKYO 100-0013

Intellectual property: Independent local firms Tier 3

The 'professional and quality consciousSUGIMURA & Partners is ‘second to none in technical expertise’ and provides ‘quick turn around time' in a range of IP-related matters. The ‘committed, prompt and reliable’ firm specialises in Japanese patent and trademark work, with experience in inception, prosecution, exploitation and enforcement. Kenji Sugimura is known for experience in architecture, design, trademarks and international treaties. He co-leads the practice with Koji Sugimura, whose areas of focus include, intellectual property and corporate law, trade secrets, IT and entertainment.


‘Good quality of work’

‘The firm has numerous strengths including: high-quality services with high success rates; responsive and smooth communication in both English and Japanese; an experienced team handling complex oppositions, appeals, and infringement suits; and highly qualified patent attorneys, with academic and industry experience covering a wide range of technologies’

‘Kenji Sugimura, Koji Sugimura, Takayoshi Kawai and Keisuke Kawahara provide excellent in-depth IP advice’

‘Sugimura & Partners provides excellent services in all facets of IP including patent and trademark prosecution and licensing’

‘The firm is valuable for advising on IP portfolio review and development’

The firm is very proactive in responding to last minute requests’

‘What makes firm stand out is its ability to understand the client’s business’

‘Kenji Sugumura can be trusted for incisive and frank advise on any matter. His leadership caliber is evident in the quality of work done by the firm’

‘The firm has a good range of technical capabilities. They also now have litigation capability’

Key clients

Kenja IP Law PC

The firm: SUGIMURA & Partners is a leading intellectual property law firm in Japan. The firm was founded in 1923 initially as SUGIMURA International Patent & Trademark Attorneys, and has been relaunched as of 1 March 2017 as SUGIMURA & Partners, with enhancement of its legal services. SUGIMURA has earned a reputation for high quality and is repeatedly ranked among the top Japanese patent and trade mark firms. It has offices in Japan and the US, providing convenient IP services to both domestic and international clients.

Areas of practice: SUGIMURA represents Japanese and international clients in patent, design, and trade mark prosecution, trial and appeal proceedings before the JPO, counseling and opinion work, due diligence, unfair competition and litigation and dispute resolution matters in Japan. The firm’s clientele ranges from single inventors and start-ups, to well established academic institutions and multinational corporations from all sectors of the global economy.

SUGIMURA delivers results-oriented solutions and offers customised services tailored to clients’ needs. It ensures close collaboration among its practice groups in order to provide clients with comprehensive multidisciplinary patent and trade mark protection across industry sectors. SUGIMURA’s attorneys combine legal insight, technical expertise, and business acumen to deliver practical solutions and strategies for intellectual property protection in Japan.

SUGIMURA has earned an international reputation for quality in Japanese IP practice and is repeatedly ranked among top Japanese patent and trade mark law firms. Its patent and trade mark attorneys possess expertise in virtually every technology sector.

SUGIMURA’s attorneys are not only skilled in the nuances of intellectual property laws and regulations; they are also technical experts in virtually every industry. SUGIMURA’s attorneys have years of experience working in-house at major corporations as researchers, engineers, and IP professionals. SUGIMURA also has attorneys who have served for decades at the Japanese Patent Office (JPO). This combination of expertise allows it to understand the perspectives of corporations and patentees as well as the JPO, enabling it to deliver practical and effective solutions to further client’s business objectives.

In order to better serve its foreign clients, SUGIMURA established a regional office in Palo Alto, California, the heart of Silicon Valley. Having a US presence allows SUGIMURA to offer better accessibility covering a wider range of time zones for foreign clients. SUGIMURA’s Silicon Valley and Tokyo offices work together seamlessly to deliver tailored solutions and around-the-clock service.

SUGIMURA’s attorneys are active in their community, presenting on topics regarding Japanese IP practice at in-house client presentations, patent seminars, and law school classes. The firm also publishes articles on Japanese IP practice in magazines distributed around the world.

Department Name Email Telephone
Litigation and legal services Koji Sugimura
Foreign filing Tatsuya Sawada
Trial and appeal procedures Tetsuo Tsukanaka
Patent prosecution Kazuyuki Tomita
Trademarks and design prosecution Ken Nakayama
Counseling and opinion work Hayato Maeda
Due diligence Takayoshi Kawai
Unfair competition Ken Nakayama
Design prosecution Yuko Muramatsu
Life sciences Tetsuo Tsukanaka
Image processing and optics Kenichi Shimoji
Communication technology Akihito Okura
Industrial manufacturing Yasuyuki Komatsu
Electrical and computer technology Yamato Okano
Chemistry Hiroshi Ikeda
Material science Keisuke Kawahara
Pharmaceutical Koichiro Jin
Automotive Yusuke Yamaguchi
Photo Name Position Profile
Mr Haruo Awano  photo Mr Haruo Awano
Ms Yuko Muramatsu  photo Ms Yuko Muramatsu
Mr Ken Nakayama  photo Mr Ken Nakayama
Mr Koji Sugimura  photo Mr Koji Sugimura
Mr Kenji Sugimura  photo Mr Kenji Sugimura
Mr Kazuyuki Tomita  photo Mr Kazuyuki Tomita
Patent Attorney / Attorney at law : 1
Patent Attorneys : 65
UK/EP Patent Attorney : 1
Japanese Patent Attorney/U.S. Patent Agent : 1
U.S. Patent Attorney : 1
U.S. Attorneys : 2
U.S. Patent Agent : 1
Japan Patent Attorneys Association (JPAA)
Japan Intellectual Property Association (JIPA)
Associaion Internationale pour la Protections de la Propriété Intellectuelle (AIPPI)
Asian Patent Attorneys Association (APAA)
Fédération Internationale de Conseils en Propriété Industrielle (FICPI)
International Trademark Association (INTA)