Chambers & Partners has detected the use of an ad blocker.
We make use of tailor-made ads to enhance your experience of our website.
Please 'whitelist'
Asia-Pacific Guide
Firm Profile

Ohno & Partners

Firm Profile


  • Profile
  • Marunouchi Kitaguchi Bldg. 21F
  • 1-6-5, Marunouchi
  • Chiyoda-ku
  • Tokyo
  • Tokyo-to
  • Japan
  • 100-0005

Firm profile submitted by Ohno & Partners

Chair of the Firm: Seiji Ohno (admitted in Japan and New York)
Number of partners: 9
Number of other lawyers: 15
Languages: English, Japanese

Ohno & Partners, established in 2000, is a unique firm, composed of 8 Bengoshi (Attorneys-at-Law) and 16 Benrishi (Patent Attorneys). The firm continues to provide a full range of legal services in all aspects of IP (patents, trademarks, design patents, copyrights, unfair competition, etc.) including litigation, prosecution, licensing, IP due diligence, opinion, and counselling.

Intellectual Property:

■ Litigation (patent, trademark, design, utility model, copyright, unfair competition, etc. (especially, high-ended technology)
■ Invalidation trial
■ Opposition
■ Action against trial decision

Opinion & Legal Advice:
■ Legal advice on IP related disputes in foreign countries (including discovery)
■ Opinion on infringement and validity of IP rights
■ Legal advice on licensing and transaction of IP rights
■ Preparation and review of written contracts (Japanese, English and Chinese)

Establishment of IP Right:
■ Patent and utility model
■ Prior art search
■ Application
■ Prosecution
■ Patent portfolio construction
■ Support for foreign prosecution

Trademark & Design:
■ Trademark search and prior design search
■ Negotiation for licensing and transaction
■ Application
■ Prosecution
■ Support for foreign prosecution

Technical Areas:
Chemistry, biochemistry, biotechnology, pharmaceuticals, diagnostic techniques, software, IT, communication, electronics, business method, optical circuits, optics, opt-electronics, image processing, display devices, magnetic storage technology, semiconductor, material sciences, ceramics, mechanics, mechatronics, thermal engine, control technology, precision machine, etc.


  • Marunouchi Kitaguchi Bldg. 21F,
  • 1-6-5, Marunouchi,
  • Chiyoda-ku,
  • Tokyo,
  • Tokyo-to
  • Japan
  • 100-0005
  • Tel + 81 3 5218 2330
  • Fax + 81 3 5218 2332
  • Email : [email protected]
  • Website :