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Shogo Asaji
Of Counsel


(T) +81.3.6744.1612
(F) +81.3.5401.2725


  • Georgetown University (LL.M. in International and Comparative Law with distinction 1998); American University (J.D. 1996); The Johns Hopkins University (M.A. 1990); Tufts University (B.S. in Mechanical Engineering cum laude 1988; B.A. in Economics cum laude 1988)

Bar Admissions

  • Registered Foreign Lawyer in Japan (Daini Tokyo Bar Association), New York, U.S. Court of Appeals for the Federal Circuit, and various U.S. District Courts


  • Intern to Judge Robert H. Hodges Jr., U.S. Court of Federal Claims (Summer 1994)

Shogo Asaji is an IP lawyer and litigator, whose practice covers both the United States and Japan. His practice focuses on intellectual property litigation, adversarial licensing, patent analysis, and IP counseling. He represents clients in infringement litigation before U.S. courts and the ITC and in administrative proceedings before the USPTO. He assists pharmaceutical companies in Hatch-Waxman/ANDA cases. Shogo also prepares legal opinions, engages in licensing negotiations, and has experience prosecuting U.S. patent applications. He advises on international contract and business disputes as well.

Shogo also counsels U.S. and non-Japanese companies on patent matters in Japan, including litigation, customs proceedings, invalidation proceedings at the Japan Patent Office, IP licensing and purchase negotiations, obtaining legal opinions, and responding to warning letters. He recently assisted a major U.S. electronics and computer company in the Japanese front of a global, multijurisdictional patent litigation. Shogo has handled matters involving LEDs, transistors, semiconductor manufacturing equipment and processes, data storage devices, databases, networks, wireless communications, universal mobile telecommunications systems (UMTS), liquid crystal displays, DVDs, digital projectors, user interface technology, nonsteroidal anti-inflammatory drugs, COX-2 inhibitors, growth hormones, antibodies, antiviral drugs, vaccines, polymer tablets and microcapsules, fire retardant chemicals and polymers, organic cleaning solvents, insulin injection devices, software, and business methods.

Shogo practiced in New York before moving to Tokyo. Prior to becoming a lawyer, he worked as an executive for a mid-sized Japanese company and has resided in Switzerland and France. Shogo is bilingual in Japanese and English and has working knowledge of French.

Shogo is the co-hiring partner and pro bono coordinator of the Tokyo Office.

Honors & Distinctions

  • Named to Best Lawyers in Japan in the area of intellectual property (2010-2014)

    Recommended lawyer for intellectual property, Japan (international firms) by The Legal 500 Asia Pacific (2015-2017)

    President, Tokyo IP American Inn of Court (2018-2019)


English, Japanese, French
Shogo Asaji