Masashi Moriwaki

President at M & Partners, IP, PC
Ranked in Japan: Domestic
IAM Research

The Patent 1000 focuses exclusively on patent practice and has firmly established itself as the definitive 'go-to' resource for those seeking world-class legal patent expertise.

Silver - Individuals: prosecution

Masashi Moriwaki's Profile

Masashi Moriwaki has broad experience in all aspects of IP law in Japan, including prosecution, litigation, licensing, opinions and evaluation.

Prosecution of patent and trademark applications before the Japan Patent Office (JPO) is a focal point of his practice. He has extensive experience handling IP rights matters related to the high-tech industries, including electronic devices, material science and computer technology based on physics or chemistry.

Mr Moriwaki graduated from Tokyo-Tech, the Tokyo Institute of Technology, with a master’s in electronic devices, and from Nagoya-Tech, the Nagoya Institute of Technology, with a BSc in electric and information technology. While at the Tokyo Institute of Technology, he studied in the Precision and Intelligence Laboratory. During this period, he frequently participated in presentations at domestic and international conferences on ferroelectric devices.

Mr Moriwaki received his qualification as a patent and trademark attorney from the Japan Patent Attorney Association (JPAA) in 2000. He is a member of the JPAA and is qualified to represent clients in applications and litigation as a patent attorney before the Japan Patent Office, the Japan Intellectual Property Arbitration Center, the District Court, the Intellectual Property High Court and the Supreme Court.

Mr Moriwaki founded MORIWAKI IP, PC in 2002 after working as an in-house patent attorney for Matsushita Electric Industrial Co and at the Panasonic IP Center. From 2008 to the present, he has served as technical adviser of the Intellectual Property High Court part-time.

In 2022, MORIWAKI IP, PC merged with Mori & Associates, a mid-sized IP Law firm in Osaka with an over 40-year history, and renamed the firm M & Partners, IP, PC. This rebranding happened along with a new global branding strategy intended to position the firm better on the Global Intellectual Property market.

Get unlimited access to all IAM content