辻丸国際特許事務所のサイトです

Providing flexible services     

Our patent attorneys provide you with various proposals with due consideration of your business based on deep and accurate understanding of your technologies, brands, designs, etc.



→ Staff

Skills of advanced specialty

We apply our know-how for analyzing technologies and preparing documents in the cutting-edge field of biology and chemistry to a wide range of fields, which enables us to make highly convincing arguments to JPO and courts.

→ Legal Profession

Litigation, Trial, Negotiation

We are willing to undertake infringement litigations/negotiations and invalidation trials. Furthermore, we work closely together with law firms specialized in intellectual property rights in Japan.


→ About us

Providing information     

We open seminars on a regular basis in order to provide information on the latest practice. In addition, we are willing to give talks on topics at your request.




→ Seminar

President’s messege

 In recent years, the flow of technological innovation has become even faster, and research and development are accelerating in various fields, including computer science such as artificial intelligence (AI), data science, healthcare such as medicine, life science, and energy revolution such as carbon neutrality. The importance of intellectual property rights as a result of R&D is increasing.

 It is no exaggeration to say that intellectual property strategy is the key to the success or failure of business strategy, and in turn, has an impact on national strategy.

 Our highly specialized, experienced, and proven staff is capable of responding to the most advanced research and development in various fields and proposing and constructing intellectual property strategies that are appropriate for each company, university, and other academia.

Representative Patent Attorney: Koichiro Tsujimaru, Doctor (Engineering), Doctor (Medicine)