• Our Management

Felix-Reinhard Einsel

Managing Partner, Patent Attorney

Felix-Reinhard Einsel, born to a German father and Japanese mother in Japan, studied Comparative Law in Japan after graduating from the German School in Tokyo. He continued his education in the United States and Japan with degrees in Law and Electrical Engineering. He is a member of the New York State Bar Association and was the first ever national of a European country to pass the Japanese Patent Attorneys exam.

Since joining the firm in 1994, Mr. Einsel has gained widespread recognition among clients in and outside of Japan as a trusted partner in all matters of Intellectual Property. Throughout his career, Mr. Einsel has played an active role in the international community in Japan and was recently elected board member of the German Chamber of Commerce in Japan.

Following in the footsteps of his father, Reinhard Einsel, Felix Einsel became Managing Partner of the firm in 2009 and is leading the firm into the second century of successful operations in Japan.

Keiji Isaji

Managing Partner, Attorney-at-Law

Keiji Isaji began his career in April 1981 as a newly-licensed attorney working for the Japanese law firm of Tanaka & Takahashi until portions of the firm were merged into Clifford Chance in 2011. Mr. Isaji then spent the next 14 years at the international global firms of Clifford Chance and K&L Gates, giving him the rare experience of being a partner for nearly equal periods of his career at both Japanese domestic and global firms and providing him with a unique insight into the legal issues that affect Japanese and international companies.

Mr. Isaji is well known in the legal community for his expertise in aircraft-related civil and criminal litigation, aircraft leases and other related financial transactions. He has been lead defense counsel in numerous high-profile white collar criminal defense cases in Japan and is a featured attorney in the Who’s Who Legal under Transport – Aviation Contentious.

In August 2014, Keiji Isaji joined Sonderhoff & Einsel as Managing Partner, jointly leading the firm with Felix-Reinhard Einsel.