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Home > Lawyers > Partners > Kenji Tosaki

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Partner

Kenji Tosaki

Kenji Tosaki

Admitted to bar

2008, Japan

Languages

Japanese and English

Contact

Contact this Lawyer

TEL : +81-3-6889-7206
FAX : +81-3-6889-8206

Practice Areas

IP Disputes, IP Transactions, Disputes in Foreign Jurisdictions, Pharmaceutical and Health Care, Civil and Commercial Disputes, General Corporate, IT and Telecommunications, Media, Entertainment and Sport

Biography

Kenji Tosaki is a partner at Nagashima Ohno & Tsunematsu.  His practice focuses on dispute resolution.  He specializes in intellectual property litigation and complex commercial litigation, and he also covers the area of TMT including data protection matters.

In the area of intellectual property litigation, he has been handling both IP infringement litigations and IP invalidation litigations before the IP High Court, the Supreme Court, District Courts and Japan Patent Office.  His IP expertise includes a wide variety of IP matters (patents, copyrights, trademarks, design rights, unfair competition and trade secrets) in many areas, such as pharmaceuticals, telecommunications, electronics, social games, medical devices and chemicals.  He also provides pre-litigation counseling, including infringement/invalidity analysis.

In the area of complex commercial litigation, he gives advice on matters such as securities law and cross-border contract.

He is a member of the Japan Association of Industrial Property Law, the Copyright Law Association of Japan and AIPPI Japan (International Association for the Protection of Intellectual Property). He is also an active member of TechLaw Group (http://techlaw.org/), which is a global network of technology savvy law firms.

Education/Professional Experience

1996

The University of Tokyo (LL.B )

1998-2000

Judge of Tokyo District Court

2000-2002

Judge of Hachioji Branch of Tokyo District Court

2001-2002

Visiting Scholar, Southern Methodist University Dedman School of Law

2002-2004

Deputy Director, Planning and Legal Division, Planning and Coordination Bureau, Financial Services Agency

2004-2004

Judge of Tokyo District Court

2004-2005

Deputy Director, Office for Privitization of Japan Post, Cabinet Secretariat

2005-2006

Judge of Tokyo District Court (Intellectual Property Division)

2006-2008

Judge of Takamatsu District Court

2008-

Nagashima Ohno & Tsunematsu

2010-present

Member of Policy Commission, Type II Financial Instruments Firms Association

April-September 2011

Adjunct Lecturer, Sophia Law School

2013-present

Partner, Nagashima Ohno & Tsunematsu

2016-2017

Chairman, Panel of Experts of Research regarding IP Strategy of Field in Regenerative Medicine, Japan Agency for Medical Research and Development

2017-2018

Committee Member, Research regarding IP Strategy and Optimization of Practical Use in Biopharmaceutical, Japan Agency for Medical Research and Development

2017-2018

Chairman, Panel of Experts of Research regarding the handling of experimental research data in deriving achievements in the medical field, Japan Agency for Medical Research and Development

2018-present

Committee Member, Research regarding IP contracts, etc., for deriving investigator-initiated clinical trial data, Japan Agency for Medical Research and Development

Seminars

September 20, 2019

NO&T Seminars

"Transboundary Innovation and Law"

June 13, 2019

NO&T Seminars

US Patent Practice Seminar
"US Patent Litigation - What's Hot and What's Not"

February 26, 2018

NO&T Seminars

"US Patent Litigation ‒ Recent Developments, Trends and Best Practices"

January 29, 2018

Seminars

Outline of Civil Trial for Intellectual Property, Case Study

May 19, 2017

NO&T Seminars

Part 5 "Hot Topics in Patents in the Pharmaceutical Industry - Patent Term Extension and Doctrine of Equivalence"

March 24, 2017

Seminars

Big Data Case Study and Discussion (Panel Discussion)

November 15, 2016

Seminars

A Global Look at the Liability and Defenses of Social Media Sites and Other Network Services

April 26, 2016

NO&T Seminars

ADVANCE Corporate Law Seminar - Pioneering the Frontier in Corporate Law
2016 Part 2 IP Seminar
"Latest Intellectual Property Issues (NO&T IP Forum 2016)"

October 16, 2015

Seminars

Patent litigation practice in Japan

Publications

July, 2019

Articles

The Legal 500: 3rd Edition Intellectual Property Comparative Guide - Japan

The In-House Lawyer (online)

April, 2013

Articles

Recovering your losses

The 2013 Guide to Japan 11th Edition A Supplement to International Financial Law Review, April 2013

Topics

April 4, 2019

Awards

High evaluation received in the 2020 Edition of "The Best Lawyers in Japan"

April 6, 2018

Awards

High evaluation received in the 2019 Edition of "The Best Lawyers in Japan"

March 3, 2017

Awards

High evaluation received in the 2018 Edition of "The Best Lawyers in Japan"

February 29, 2016

Awards

High evaluation received in the 2017 Edition of "The Best Lawyers in Japan"

May 28, 2015

Awards

High evaluation received in the 2016 Edition of "The Best Lawyers in Japan"

October 17, 2014

Awards

High evaluation from Best Lawyers in the Fifth Edition of "The Best Lawyers in Japan"