Jin Okinaka
Founder,Patent Attorney
Qualified IP Litigator


Prior to founding Three Well IP Law Firm in 2008, Jin Okinaka gained nine years of experience working at other Japanese patent law firms (1999-2008). Prior to entering the patent profession, he gained four years experience as a research engineer in the chemical department of Rasa Industries, Ltd. (1995-1999).

Bar Admissions

Jin Okinaka took and passed the patent attorney examination in 2005 and has been registered to practice before the Japanese Patent Office since 2005.


M.S., Macromolecular Science and Engineering, Kyoto Institute of Technology, 1995
B.S., Macromolecular Science and Engineering, Kyoto Institute of Technology, 1993

Experiences at Rasa Industries, Ltd.

During the four years at Rasa Industries, Ltd., Mr. Okinaka was primarily engaged in R&D activities with inorganic polymer flocculants for water treatment, super-purity phosphorus for electronics materials, phosphate glasses for use in the electronics industry, and titanium-dioxide photocatalysts.

Practice Areas

We practice in the area of intellectual property law, including preparing and prosecuting patent applications, rendering opinions on patent validity, patent searching, patent counseling, assisting in patent litigation, translating patent and technical documents, IP consulting, registering copyrights, and providing in-house training for clients’ technical staff. With our rich experience and knowledge on patent prosecution, we can suggest appropriate options for our clients, such as accelerated examination and oral interviews when needed.
We have extensive experience in a wide variety of technical areas including machines and devices, materials and chemistry, biotechnology, etc. Below is a detailed list of subject matters we are familiar with.

Machines and devices

Plants, Pipe equipment
Manufacturing equipment
Solar cells, Fuel cells
Analyzers, Testers
Image display and formation devices
Medical devices

Materials and chemistry

Polymers, Resins
Organic/inorganic composite materials
Electronic materials
Porous materials


Regenerative medicine
Microbial technology
Genetically modified plants and animals
Agricultural chemicals
Fermentation technology
Health food

Other areas

Business methods
Everyday items
Sporting goods
Health-enhancing goods
Fiber products


KDX Tosabori Building 10th Floor, 5-11, Tosabori 1-chome, Nishi-ku, Osaka
550-0001, Japan
TEL +81-6-6459-7531      FAX +81-6-6459-7541