About Us

President Tomohiro Sakamoto
Tomohiro Sakamoto
Since 2006, Sakamoto and Partners is a Japanese patent law firm that has been providing high quality and prompt services to our clients.

As part of our legal services, we strive to foresee complications and propose solutions related to an intellectual property issues before these issues can become a problem. Additionally, we endeavor to propose alternatives for solving problems related to our client’s intellectual property rights.

Strengths of Our Firm

Sakamoto and Partners employs several former Examiners and Appeal Examiners from the Japan Patent Office. Our staff brings a plethora of experience in examining Japanese patent applications and are highly knowledgeable with regard to the Japanese Patent Office examination procedures. In addition, our law firm is able to not only aide in the acquisition of intellectual property rights, but also helps litigate in the event that our client’s patent, design, or trademark rights are infringed. We also strive to ensure that our clients are granted intellectual property rights to the fullest extent possible.

Another strength of our firm is that Sakamoto and Partners employs Chinese, Korean, and United States patent attorneys who can respond to your inquiries in Chinese, Korean, and English. Language barriers can create issues when prosecuting patent, design, and trademark applications in Japan; however, our law firm is able to efficiently and effectively help clients streamline the application process and minimize delays related to miscommunication. Many of our Chinese, Korean, and Japanese patent attorneys and IP paralegals are also fluent in English. We are also able to use our in house international staff to improve the quality of translations between Japanese and English, Chinese, and Korean.

Furthermore, Sakamoto and Partners has a highly specialized search team for patents, designs, and trademarks at our firm. Most patent firms in Japan do not employ specialized search teams to aid their clients like we do. Our law firm’s experienced and skilled search staff can conduct patent, design, and trademark searches with higher accuracy in a variety of technical fields. Sakamoto and Partners also specializes in patent invalidation searches, and as part of the invalidation searches, we monitor, oppose, and invalidate third-party proceedings, as necessary.

We hope you will use our services when dealing with your third-party observation, opposition, and invalidation proceedings, even if you do not have any prior art publications. Sakamoto and Partners is able to conduct invalidation searches in order to collect prior art publications needed to aide in filing third-party observations, oppositions, and invalidation proceedings with the Japan Patent Office.

Finally, our Japanese patent lawyers have a vast amount of experience in filing patent applications at the Japan Patent Office for foreign clients. Our staff will carefully assist and explain Japanese patent, design, and trademark law as well as propose the best strategies for obtaining intellectual property rights even if you are not familiar with Japanese intellectual property law.

Our law firm is always on your side, providing meticulous representation, protection and enforcement of your intellectual property rights. Moreover, China, India and ASEAN countries have recently been experiencing rapid growth in their economies, and as Japan is close to these countries, our firm is able to swiftly aid our clients in these countries as the time difference is minimal.

We hope you will consider asking Sakamoto and Partners to become your new intellectual property hub in these developing Asian areas.

Office Profile

Trade Name Sakamoto & Partners

Tokyo Office

Address:Yamatoya Building, 2-13 Yotsuya, Shinjuku-ku, Tokyo 160-0004 JAPAN
TEL:+81-3-5919-3041(main) FAX:+81-3-5919-3042
URL:http://www.sakamotopat.com E-mail:info@sakamotopat.com

Osaka Office

Address: DOJIMA Building 6th floor, 2-6-8, Nishi-tenma, Kita-ku, Osaka city, Osaka, 530-0047, JAPAN
TEL: +81-6-6755-4892 FAX: +81-6-6755-4893
Staff President patent attorney:Tomohiro Sakamoto
Staffes:25 Attorneys and 30 paralegals
Areas of Practice Patents, Utility Models, Design, Trademarks, Unfair Competition, Copyrights, Foreign Applications, Patent and Trademark Registration Opposition, Patent Term Extensions, Trial Decision Cancellation Litigation, Infringement Litigation, Expert Opinions, Prior Art Searches, Freedom to Operate (FTO) Searches, Trademark Searches, Selective Dissemination of Information (SDI), Maintenance Fees/Annuity and Renwals, Consulting, Contract Representation, Various Kinds of Training, etc.
Technical Fields Mechanical Engineering, Electrical Engineering, Electronics, Communications Engineering, Semiconductors, Computer Engineering, Software, Medical Devices, Material Engineering, Chemistry, Biotechnology, Food, Pharmaceutical, etc.
Law Firm Features:
  • Provides support for domestic and foreign IP applications both during the application stage and during the post-grant enforcement period.
  • Specializes in prior art searches.
  • Advance intellectual property rights abroad through a wide network of foreign offices.
Foreign Office Affiliations USA, Europe, Canada, China, Korea, Taiwan, India, Thailand, Malaysia, Singapore, Indonesia, Australia, Mexico, Brazil, Argentina, Israel, Yemen, Saudi Arabia, Iran, UAE, Iraq, Turkey, South Africa, etc.

Access Map

Nearest Stations
  • Yotsuya Sanchome Station: 4 min walk (Marunouchi Line)
  • Yotsuya Station: 8 min walk (JR and Namboku Lines)