Patents, Utility Models, Trademarks, Designs, Litigation, Licensing, Search and Consultation



In May 1985, Fuyuki Nagai, a certified Japanese patent attorney, founded Nagai & Associates in Tokyo. Since establishment, we have been providing our services based on QCD (Quality, Cost, Delivery) to meet our client requirements.
Our patent attorneys and patent practitioners have work experience in R&D department of manufacturers. This wealth of collective experience is fully incorporated into our professional services to produce effective patents having the broadest possible scope.
In these ways, Nagai & Associates has continued to offer high quality IP legal services.
Nagai & Associates can proudly claim that each and every one of our professionals has broad experience and enhanced professional skills in all legal and technical matters related to intellectual property. Our hope is to assist and contribute to our client activities in intellectual property affairs.



Nagai & Associates provides high-quality services for patent prosecution in technical fields including mechanical engineering, electrical engineering, electronic engineering, information technology, physics, chemistry, biotechnology, and medical technology.


Our expertise extends to outstanding performance in trademark proceedings around the world. We safeguard the trademark interests of our clients in Asia ranging from Japan to Middle East, North America, Central and South America, Europe, Oceania and Africa.


・Litigation for Patents and Trademarks
・Searches for invalidation documents and other information

SHIBAURA CRYSTAL SHINAGAWA BLDG. Suite No. 901, 1-6-41, Kounan, Minato-ku, Tokyo, 108-0075 JAPAN
Telephone: +81-3-5782-8708/Facsimile: +81-3-5782-8707