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IP High Court Clarifies Limits of “Motivation to Combine” in Patent Opposition Appeal
Masashi Chusho
- Dispute Resolution
- Intellectual Property
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This article is also available in Japanese.
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*Please note that this newsletter is for informational purposes only and does not constitute legal advice. In addition, it is based on information as of its date of publication and does not reflect information after such date. In particular, please also note that preliminary reports in this newsletter may differ from current interpretations and practice depending on the nature of the report.
In January 2026, the Intellectual Property Divisions of the Tokyo District Court (the “TDC IP Division”) published their “Guidelines for Standard Essential Patents Judicial Mediation (SEPJM)” (the “Guidelines”)※1 which follows the earlier publication of the TDC IP Division’s “Guidelines for Patent Infringement Lawsuits Involving Standard Essential Patents” (the “SEP Lawsuit Guidelines”)※2,3. The Guidelines announced the TDC IP Division’s decision to implement judicial mediation for dispute cases involving standard essential patents (“SEPs”; and such mediation, “SEP Judicial Mediation”), as a special procedure under the intellectual property judicial mediation procedure※4, and set out important points regarding the SEP Judicial Mediation. According to the Guidelines, SEP Judicial Mediation is intended to resolve SEP-related disputes including disputes over the licensing royalty under fair, reasonable, and non-discriminatory (“FRAND”) terms for the SEP holder’s entire global SEP portfolio (such royalty hereinafter referred to as the “Global FRAND Royalty”), on a global basis (i.e., not limited to disputes that arise in Japan) in a more expeditious manner than a SEP Lawsuit administered under the SEP Lawsuit Guidelines. In addition, where a settlement is not reached through mediation, the Guidelines address a point that is expected to influence consideration of the abuse of rights defense (the so-called FRAND defense) in a subsequent lawsuit or preliminary injunction proceeding. Accordingly, the Guidelines will likely have a significant impact on strategies for SEP-related disputes including whether parties should choose to bring a SEP Lawsuit initially or file a petition for SEP Judicial Mediation.
We provide below a basic flowchart (with comments) describing the presumed progression of proceedings in a SEP Judicial Mediation in light of the Guidelines, and notable points regarding the Guidelines.
The Guidelines do not provide details on the procedure for implementing SEP Judicial Mediations. However, based on the information provided, the following progression of proceedings appears to be contemplated.
Special attention should be paid to the following points regarding the Guidelines:
The Guidelines have similarities with the SEP Lawsuit Guidelines in the following two respects:
As with the SEP Lawsuit Guidelines, the Guidelines highlight the TDC IP Division’s proactive and expedited approach to resolving SEP-related disputes. Introduction of SEP Judicial Mediation under the Guidelines may make resolving SEP-related disputes in Japan more attractive, particularly where a comprehensive resolution of the Global FRAND Royalty and related issues is sought. In particular, SEP Judicial Mediation under the Guidelines offers an expedited procedure for resolving SEP-related disputes which is contemplated to be faster than the litigation procedure under the SEP Lawsuit Guidelines. In this respect, the Guidelines are expected to significantly impact decisions on the choice of procedures for resolving future SEP-related disputes. Having said that, since the Guidelines were just recently published, their practical application and impact will need to be carefully considered.
We will continue to provide updates on related developments.
*1
Our unofficial English translation of the Guidelines is provided as an annex(※) to this newsletter for reference purposes only. The Guidelines (in Japanese) are published on the Tokyo District Court’s page on the website of the Courts in Japan (URL: https://www.courts.go.jp/tokyo/saiban/minzi_section29_40_46_47/SEPJM_chizai_jiken_teiki/index_2_1.html) (last accessed: April 1, 2026). As of April 1, 2026, the Intellectual Property Divisions of the Osaka District Court have not published similar guidelines for SEP-related judicial mediation.
(※) The annex is included in the PDF. To access it, click “Download full text (PDF)”.
*2
For a overview analysis of the SEP Lawsuit Guidelines, please see our firm’s newsletter “Publication of the “Guidelines for Patent Infringement Lawsuits Involving Standard Essential Patents” by the Intellectual Property Divisions of the Tokyo District Court.” (NO&T IP Law Update No.17 (March, 2026))
*3
To add some further context regarding SEP lawsuits in Japan, in the Samsung Electronics Co., Ltd. v. Apple Japan GK case, the Intellectual Property High Court, in its judgment of May 16, 2014, ruled that Samsung, the patent holder, was not entitled to seek an injunction against Apple to stop sales of certain Apple products based on its finding that “Apple Inc. and Apple Japan have a willingness to obtain a license on FRAND terms” and concluded that “the exercise of the injunction right based on the patent right in question constitutes an abuse of rights (Article 1(3) of the Civil Code).” After that decision, there were virtually no court decisions addressing this issue until early 2025. However, on June 23, 2025, in the Pantech v. Google case, the Tokyo District Court issued a judgment (the “Tokyo District Court Judgment”) granting an injunction based on a FRAND-committed SEP for the first time in Japan. For a summary of the Tokyo District Court Judgment and its significance, please see our firm’s newsletter “The Japanese court first judgment to grant an injunction based on a FRAND‑committed SEP” (NO&T IP Law Update No.16 (November, 2025)).
*4
The “Operation of the Intellectual Property Mediation Procedure” (in Japanese) setting out the TDC IP Division’s guidelines for intellectual property judicial mediations, is published on the Tokyo District Court’s page on the website of the Courts in Japan (URL: https://www.courts.go.jp/tokyo/saiban/minzi_section29_40_46_47/tizaityoutei/index.html), and a corresponding English guide, “Guide to IP Conciliation Proceedings,” is published on the Intellectual Property High Court’s page on the website of the Courts in Japan (URL: https://www.courts.go.jp/ip/eng/vc-files/eng/file/Guide_to_IP_Conciliation_Proceedings.pdf).
This newsletter is given as general information for reference purposes only and therefore does not constitute our firm’s legal advice. Any opinion stated in this newsletter is a personal view of the author(s) and not our firm’s official view. Given the nature of this newsletter as general information, statutory provisions and source citations may have been intentionally omitted. For any specific matter or legal issue, please do not rely on this newsletter but make sure to consult a legal adviser. We would be delighted to answer your questions, if any.
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