Managing Partner & Founder


Current Practice Areas

Mr. Shinji Hayami is the founder of Prezio IP Firm and an experienced Patent Attorney. Mr. Hayami’s practice encompasses all aspects of intellectual property law, handling Domestic and International Prosecutions, IP Litigations, Oppositions, Expert Opinion Work, IP Consulting, and IP Valuation in the technical fields including Chemistry, Materials, Devices, and Software. Mr. Hayami is also a frequent lecturer on the Japanese patent law and IP-related issues and has spoken at a number of events in Japan and Europe.


1. Researcher for leading Chemical Manufacturer in Japan

Prior to his legal career, Mr. Hayami researched and developed new products including electronic materials, resin molds, paint raw materials, and paper coatings for mass production. These products have been adopted and penetrated in many industrial sectors and companies as valued products.

His experience working for the chemical manufacturer provided Mr. Hayami with deep knowledge in the areas of Designs for Epoxy-containing Products, Surface Modification Technology for Inorganic Particles, Resin Molding, Thermal Stress Reduction Technology, Computer Simulation, Polymerization and Control of Polymer Properties, Scaling Up Strategies, Filing and Prosecution of Patent Applications, and IP Strategies against Competitors.

2. Patent Practitioner/Patent Attorney

Mr. Hayami started his career as patent practitioner/patent attorney at a major IP firm in Japan, focusing primarily on the Prosecution of Domestic and International Patent Applications, Appeals, and Litigations.
At the firm, Mr. Hayami gained substantial international prosecution experience and has made several visits to clients in Europe, giving lectures on Japanese patent practices such as the revision of the Japanese Patent Law.
He has also frequently spoken at seminars for patent practitioners and researchers in domestic and international companies.


・Coauthor. "Patent Evaluation Method Proposal for Universities", Patent (Official Magazine of the Japan Patent Attorneys Association) 2019, Vol. 72, No. 2 (in Japanese)
・Coauthor. “New Patent Practice Manual of Numerical Limitation Inventions and Parameter Inventions – Best Use of Development Results and Measures against Competitors’ Patents”, Tokyo: JOHOKIKO Co., Ltd., August 2018 (in Japanese)
・ Coauthor. "'Patents Inventory' and Strategies for Patent Establishment", Tokyo: Technical Information Institute Co., Ltd., December 2017 (in Japanese)
・“How to Obtain Patents Conducive to Business Growth, Part II – Patents Protecting against Competitors ” Chemical industrial economy July 2017 (in Japanese)
・“How to Obtain Patents Conducive to Business Growth, Part I – Perspective of ‘Applying for Patents to Protect and Grow your Business’” Chemical industrial economy May 2017 (in Japanese)
・Coauthor. “How to Deal with Reasons for Rejection in Chemical and Material Patents”, Tokyo: Science & Technology Co., Ltd., February 2017 (in Japanese)
・Coauthor. “[Feature Article] Development in Biomimetics Materials in Full Swing” ENGINEERING MATERIALS Vol.63 No.8, Nikkan Kogyo Shimbun Sha, August 2015 (in Japanese)
・Coauthor. "Latest Technology in Self-Healing (Scratch Recovering) Materials and Trends in Manufacturers’ Choices", Tokyo: Technical Information Institute Co., Ltd., 2011 (in Japanese)
・Coauthor. "Winnable Patent Practices on Chemical and Material Patents", Tokyo: Science & Technology Co., Ltd., 2011 (in Japanese)
・Coauthor. "Know-How for the Reply to the Notice of Reasons for Rejection", Tokyo: Science & Technology Co., Ltd., 2009 (in Japanese)
・"Know-How for Patent Prosecution Practices in Chemical and Material Fields", Tokyo: Science & Technology Co., Ltd., 2007 (in Japanese)
・Coauthor. "Claim Drafting against Diversified Earnings Structure of the Software Industry", Patent (Official Magazine of the Japan Patent Attorneys Association) 2006, Vol. 59, No. 6 (in Japanese)
・Coauthor. "Practical Considerations in ‘Patent Eligibility’ in Business-Related Inventions - For avoiding rejections under the Japan Patent Act, Article 29(i), main paragraph (Industrial Applicability)" Patent (Official Magazine of the Japan Patent Attorneys Association) 2004, Vol. 57, No. 6. (in Japanese)