Japan
Anderson Mori & Tomotsune
Aquaxis Law Office
Ashurst
Atsumi & Sakai
Baker McKenzie (Gaikokuho Joint Enterprise)
Bird & Bird
Chuo Sogo LPC
City-Yuwa Partners
DLA Piper Tokyo Partnership Gaikokuho Kyodojigyo Horitsu Jimusho
Greenberg Traurig Tokyo Law Offices
Groombridge, Wu, Baughman & Stone
Hiratsuka & Co
Hiroe & Associates
Hogan Lovells Horitsu Jimusho Gaikokuho Kyodo Jigyo
Iwata Godo
Jones Day
K&L Gates
Kaynex Law Offices
King & Spalding
Kojima Law Offices
KUBOTA
Latham & Watkins Gaikokuho Joint Enterprise
M. Ide & Co.
Mayer Brown GJBJ
Milbank
Miura & Partners
Morgan Lewis & Bockius LLP
Mori Hamada
Nagashima Ohno & Tsunematsu
Nakamura & Partners
Nishimura & Asahi
Norton Rose Fulbright
Ogier
Oh-Ebashi LPC & Partners
Okabe & Yamaguchi
Orrick, Herrington & Sutcliffe LLP
Paul, Weiss, Rifkind, Wharton & Garrison LLP
Pillsbury Winthrop Shaw Pittman LLP
PwC Legal Japan
Quinn Emanuel Urquhart & Sullivan, LLP
Ropes & Gray LLP
Sidley Austin Foreign Law Joint Enterprise
Simmons & Simmons
Simpson Thacher & Bartlett LLP
So & Sato Law Offices
SUGIMURA & Partners
TMI Associates
Ushijima & Partners
Vanguard Lawyers Tokyo
Watson Farley & Williams (Gaikokuho Kyodo Jigyo Horitsu Jimusho)
White & Case LLP - White & Case Law Offices (Registered Association)
Withers Japan, Zeirishi Houjin
Yokogi & Masui Partners
News & Developments
ViewViewLabour and employment
Changes to Childcare Leave and Caregiver Leave
The Act on Childcare Leave, Caregiver Leave, and Other Measures for the Welfare of Employees Caring for Children or Other Family Members was amended on May 31, 2024. Some of those amendments, which are as follows, take effect on October 1, 2025.
Vanguard Lawyers Tokyo - 04 June 2025
Intellectual Property
Judgment rendered by the Grand Panel of the Intellectual Property High Court on March 19, 2025, regarding the patentability of compositions which contemplate medical procedures both before and after manufacture
Introduction
On March 19, 2025, the Grand Panel of the Intellectual Property High Court (the “IPHC”) rendered their judgment in a patent infringement case. The court reversed a Tokyo District Court’s judgment and found that the defendant had infringed the plaintiff’s patent.
Nagashima Ohno & Tsunematsu - 28 April 2025
Intellectual Property
Update: A Second Court Decision addressing Patent Linkage and Unfair Competition
Introduction
As reported in NO&T IP Law Update No.8, on October 28, 2024, the Tokyo District Court issued a decision in a case involving a biosimilar manufacturer seeking a preliminary injunction against a patent holder (Samsung Bioepis Co. Ltd. v. Bayer HealthCare LLC.
Nagashima Ohno & Tsunematsu - 28 April 2025
Intellectual Property
Patents: – The Principle of Territoriality: Two Notable Judgments of the Supreme Court of Japan rendered on March 3, 2025
NEW JUDGMENTS – Principle of Territoriality and Infringement of Japanese Patent Rights regarding “Network-Related Inventions”
1. Summary
The Supreme Court of Japan rendered two unprecedented judgments on March 3, 2025, addressing the application of the principle of territoriality of patents to cross-border activities.
Nagashima Ohno & Tsunematsu - 28 April 2025