Professional Profile
Japanese Patent Attorney / IP Infringement Litigator (Reg. No. 10441), Japan.
Patent Agent, United States Patent and Trademark Office.

Mr. Yaguchi is not only a bi-national patent agent/attorney, he is also an entrepreneur with two origami studios in the United States, where he tries to share the Japanese paper art he loves. He also blogs on IP, origami, and cultural topics. English versions of his posts can be found at Patents and Paper. He splits his time between the Philadelphia and Tokyo offices of Keisen Associates, so e-mail is the simplest way to reach him.


BE, Mechanical Engineering, Tokyo University of Science, 1990.
Qualified as Patent Attorney, National Industrial Property Council Examination Passed in 1993 (Passing Rate was 2.8 %).
Completion, The Patent Attorneys Association Industrial Property Right Law Training Institute, 1994.
Qualified as Patent Attorney IP Infringement litigator for Intellectual Property Infringement Courtroom Litigation.
National Industrial Property Council Examination Passed in 2008

Bar and Court Admissions

Japan, Specifically licensed to practice Intellectual Property laws*, 1993.
Japan Patent Office, for Patent, Utility Model, Design and Trademark cases, 1993.
United States Patent and Trademark Office for Patent and Design cases, 2002.
Admitted to Japan’s District Courts, High Courts, and Supreme Court in intellectual property litigation representation (see detailed CV for specifics.)

*Intellectual Property laws in Japan include: Patent Law; Utility Model Law; Industrial Design Law; Trademark Law; Copyright Law; Trade Secret and Unfair Competition Prevention Law; Semiconductor Circuit Layout Design Law; Plant Law; and Customs Law.
** Specific Intellectual Property Infringement lawsuits include any infringement lawsuits involving Patent, Utility Model, Design, Trademark, Trade Secrets and Anti Competition Prevention Laws.

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