Name: Aki Ryuka
Firm Name: RYUKA IP Law Firm
Jurisdiction: Japan
Practice Area: Patent Law

Telephone: +81-3-5322-6375

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Professional Biography:

Leaders in Law endorses Aki Ryuka as our exclusively recommended Patent Law expert in Japan. If you wish to get in touch with Aki, please use the contact information provided above.

In 1987, Mr. Ryuka began his career as an electrical engineer in the facsimile machines department of Canon Inc. Five years later, he joined Tani & Abe Patent Attorneys in Tokyo, Japan, where he prosecuted patent applications of foreign and domestic applicants including Canon Inc.

From 1995 to 1998, Mr. Ryuka worked in the Washington, DC office of US firm Cushman Darby & Cushman (now Pillsbury Winthrop Shaw Pittman LLP), where he mainly prosecuted patent applications for Japanese clients. At the same time, he established a patent firm in Japan and a translation company in the US, the predecessors to RYUKA IP Law Firm, facilitating business for Cushman Darby & Cushman. While in the US he passed the US patent bar exam.

Since founding RYUKA IP Law Firm, he has lectured extensively in Japan and abroad on IP topics, has published numerous articles including recently detailing RYUKA’s invention consulting services (Patent Visualization), and visits clients and attends conferences in the US, Europe, and Asia. Recent work in 2012 includes representing a large US client in nullity trials before the Japan IP High Court and Supreme Court, together with colleagues Mr. Akashi and Mr. Takata in cooperation with Nagashima Ohno & Tsunematsu, and representing a large Korean client in infringement and nullity trials in cooperation with Anderson Mori & Tomotsune.

Practice Areas

Prosecution, Licensing, Litigation, Opinions, and Customs Surveillance in the fields of Japanese Patent, Design, and Trademark law. Mr. Ryuka specializes in electronics, semiconductors, software, data communication, and radio communication.


  • Master of Engineering, The University of Tokyo, 1987
  • Bachelor of Engineering, Tohoku University, 1984


  • Japan Patent Attorneys Association (JPAA)
  • Japan Intellectual Property Association (JIPA)
  • Asian Patent Attorneys Association (APAA)
  • International Association for the Protection of Intellectual Property (AIPPI)
  • Licensing Executives Society, Japan (LES, Japan)
  • Electrical Information and Communication Society (EICS)
  • American Bar Association (ABA)
  • American Intellectual Property Law Association (AIPLA): Japan Committee
  • International Trademark Association (INTA)

Firm Overview:

The importance of patents is growing.

For example, a company acquiring the most patents for autonomous vehicles is a U.S. software company. The company may achieve more profits from cars in the future than car manufactures. This means that the time has come for the companies without manufacturing and selling sections to overwhelm the manufacturing companies by utilizing research-and-development and patents.

The patent system supports such changes in the social structure. More companies focus solely on research-and-development and provide their technologies, utilizing patent licenses. The license accelerates the improvements in the products and technologies in the world because the licensees can avoid the same research and focus on their strength.

As the social structure changes, patents will be even more important. In particular, making an investment for future technologies and building a patent portfolio for the future will be critically important. The role of patent law firms also changes. We must support the creation of inventions by searching relevant proposals from patent publications and discussing with the inventors.

The patent system facilitates not only to sell and purchase technologies and parts but also to outsource production and sales, thereby develops cooperative relations between companies and between nations.

To fulfill our responsibilities toward that time, RYUKA will continue to make steady efforts.