Nagato & Partners has been expanding with the addition of attorneys and technical professionals in various fields including electrical and electronic engineering, physics, materials, and chemistry as well as mechanical and mechatronic engineering. Nagato & Partners has about forty members in total including patent and trademark attorneys.

Patent and Trademark Attorney *(Me):Mechanics, (E):Electronics, (Ma):Material, (C):Chemistry,
 (B):Biotechnology, (P):Pharmaceutical, (T,D):Trademark & Design

The profiles of the partners and the director of Department of Client Relations & Management are as follows:


Kanji NAGATO, president(senior partner)and founder, after finishing his master’s course in mechanical engineering at Kyoto University, engaged in research and development of aircraft jet engines at the Aeronautics and Space Division of IHI Corporation for about ten years, and established Nagato & Partners in 1985. The technical fields in which he has worked all these years include mechanical engineering, hydrodynamics, combustion engineering, heat transfer engineering, control engineering, production/processing engineering, and design and trademark. Kanji is a member of AIPPI, APPA, LES, VPP, IPO, Japan Patent Attorneys Association, Japan Trademark Association, Japan Intellectual Property Association, and is qualified as an arbitrator/mediator at Arbitration Center for Industrial Property. The membership in these organizations has supported his longtime success as a practitioner in the intellectual property field. He speaks Japanese and English.


Shiro AIHARA, senior partner, completed a Bachelor of Engineering (mechanical engineering) at Tohoku University. He has eight-year work experience with Nissan Motor Co., Ltd., where he engaged in vehicle manufacturing technology development. Because of his skills acquired at Nissan in the fields of welding, industrial robots, transport, etc., Shiro excels at mechanics, automobile engineering, and mechatronics. He is a member of Japan Patent Attorneys Association, and speaks Japanese and English.

Nobuyuki OKAJIMA

Nobuyuki OKAJIMA, partner , completed a Bachelor of Agriculture (forest product major) at Tokyo University of Agriculture and Technology. In addition to the experience in a paper manufacturing company as an engineer, he engaged in Intellectual Property Division of Japan Tobacco, Inc., handling various cases related to tobacco manufacturing machines, material testing machines, vending machines, etc. He specializes in mechanics/mechatronics, electrical/electronics, chemistry, and material science, and is a member of Japan Patent Attorneys Association. His languages are Japanese and English.

Norio HAGI

Norio HAGI, partner, after finishing his master’s course in the industrial biochemistry of the faculty of engineering at Kyoto University, engaged in research and development of an artificial sweetener (aspartame) and clinical diagnostic kits using monoclonal antibodies at R&D Department of TOSOH Corporation for seventeen years. And he engaged in practices relating to intellectual properties and various contracts at IP department of TOSOH Corporation and the affiliated companies for seventeen years, bofore joining Nagato & Partners in Aug. 1st, 2013. His technical field is biochemistry, organic and inorganic chemistry. He is a member of Japan Patent Attorneys Association, and speaks Japanese and English.

Takako OKADA

Takako OKADA, partner, completed a Bachelor of Arts at International Christian University (ICU) with a major in international studies. She has ten-year work experience with one of the major IP firms in Tokyo as a Patent Attorney admitted in Japan with a qualification as an IP litigator, and joined Nagato & Partners in September 2014. She is specialized in trademarks, designs, anti-counterfeiting, and unfair competition prevention law. Takako is a member of the Japan Patent Attorneys Association (JPAA), the Asian Patent Attorneys Association (APAA). She speaks Japanese, English and Vietnamese.


Kanji INOUE, director of Department of Client Relations & Management, assumes the responsibilities in the development of new clients and the prompt respond to our clients’ requests. After completing a Bachelor of Applied Physics at Tokyo University, he worked for Bridgestone, a global tire manufacture, to engage in new plant buildings, tire production machine development, R&D of diversified products such as pneumatic actuators and robots driven by the actuators. At Bridgestone, he was also involved in worldwide marketing on a vast variety of products. Kanji gathered practical IP experience at both Bridgestone and patent firms. With this wide range of career and experience, he joined Nagato and Partners in 2010. He speaks Japanese, English, and German.