Intellectual Property Dispute Resolution

Our firm has a practice group that specializes in domestic and international intellectual property dispute resolution. For domestic intellectual property disputes, various types of proceedings, such as infringement lawsuits, trials before the Japan Patent Office, litigation rescinding trial decisions, and injunctions on importations at customs, may occur. Our practice group has several intellectual property lawyers with significant practical experience in all of the foregoing procedures, capable of organizing appropriate teams according to the scale and complexity of a case, and able to provide high quality legal services. We have handled cases in various industrial fields, including electronic devices, semiconductor, IT, energy, environment, pharmacy, life science, healthcare, and consumable goods. Our firm also has extensive experience not only in handling large-scale disputes, but medium- and small- scale disputes as well.

In addition to our accomplishments in infringement lawsuits, we have also achieved considerable success in handling disputes on inventions developed by employees, disputes over who the inventor is, and litigation relating to extensions in the duration of the registration of pharmaceutical products, litigation or arbitration arising from license agreements, and litigation under unfair competition prevention laws.

For international intellectual property disputes, we provide comprehensive legal support to companies involved in various cases, such as patent lawsuits that are simultaneously filed overseas (including in the United States and Europe) as well as intellectual property enforcement actions (litigation/administrative enforcement), and trademark invalidation litigation in Asia. In handling cross-border disputes over intellectual property, which occur in global business developments by companies, we assist in resolving such disputes effectively and strategically, making use of our strong network of law firms all over the world.

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Lawyers in charge of Intellectual Property Dispute Resolution

PublicationsArchives

2026.04.24
Lexology Panoramic - Designs 2026 - Japan Chapter
2026.04.20
JP-DRP Precedent Review Report (2026 Edition)
2026.01.30
(Q67) Principle of Territoriality
2025.07.29
Pantech v Google: Tokyo District Court grants first injunction for SEP infringement（Co-authored）
2025.01.20
Article 10 (Orders to Protect Confidentiality); Article 11 (Rescission of Protective Orders)
2025.01.10
Decision of the Court of First Instance of the Unified Patent Court Central Division (Section Munich)on July 16 2024 -- A Central Attack on a Patent for an Antibody Drug Characterized by Means
2024.05.01
Legal Issues Related to Generative AI
2024.04.20
Judgment in Which the Court Determined Whether or Not the Relevant Act Constitutes an Indirect Infringement by a Non-Exclusive Article (Item 2, Article 101 of the Patent Act) Pertaining to Invention of a Product- Requirements for Indirect Infringeme
2023.08.24
Thematic-based: Legal Practice in the Healthcare Business
2023.02.28
National Comparison Tables - Japan part
2022.03.01
Summary of Countermeasures for Counterfeit Products in the US
2022.02.04
A Case in Which the Applicability of Article 3, Paragraph 1, Item 3 of the Trademark Act was Disputed with Respect to the Trademark "VEGAS" (Intellectual Property Newsletter (2022 February Issue))
2021.12.01
A Detailed Explanation of Economic Partnership Agreements
2021.08.05
A Case in Which a Court Admission Rendered in the First Trial was Overturned upon Considering Issues of Conventional Technology and Revising Judgment Based on the Fulfillment Theory (Intellectual Property Newsletter (2021 August Issue)
2021.05.07
A Case in Which the Japan Patent Office and the Court Reached Different Decisions Regarding Similarity in the Inventive Step of Two Inventions (Intellectual Property Newsletter (2021 May Issue))
2021.04.01
Patent Enforcement Practices Before, During and After Patent Litigation Proceedings in Japan - A Comparative Analysis with Germany and the United States -
2021.03.05
A Case Involving a Dispute Over Similarity of Trademarks and Other Matters Related to Services Supporting Job Seeking Activities by Currently Unemployed Recent Graduates with Work Experience (Intellectual Property Newsletter (2021 March Issue))
2021.01.26
Intellectual Property Newsletter (Digest version) (2021 Winter Issue) Key Points in Reading Case Reports
2021.01.01
The Ways of Limiting Injunctive Relief in Patent Infringement Litigation and their Effects - Current Japanese Practices and Suggestions for their Future Improvements, based on the Recent Trends in Germany and the United States -
2020.09.10
Analysis of Domestic Court Cases concerning Inventions Related to Computer Software (CS)
2020.08.13
Consideration on the Bill of the Act Partially Amending the Plant Variety Protection and Seed Act -- For the Protection of New Varieties of Plants
2019.07.10
A Case in Which Production, Transfer, etc. of Software was Found to Constitute Indirect Infringement of an Invention of a Device (Article 101, Item (ii) of the Patent Act)
2019.05.30
Q13: Inventiveness (4) -- Methods of Business; Q42: Application (2) -- Supporting Requirements, etc.; and Q76: Terms of Claims
2019.05.10
Analysis of Recent Trends in Case Court Cases Regarding Inventive Step
2019.01.01
Business and IP commitments in Economic Partnership Agreements (EPAs)
2018.07.06
7. Multiple Rightholders
2018.05.28
Transfer
2018.03.21
The Compass for Intellectual Property Law - The Supreme Court Ruled on a Re-defense based on a Correction of Claims against a Patent Invalidity Defense in a Patent Infringement Case
2018.03.01
IP Laws of the Philippines
2018.02.19
Q&A on the Actual Practice of Employee Inventions (Keiso's Law and Practice Series)(co-author)
2017.09.29
"Significant Effects" in Pharmaceutical Inventions as Seen in Recent Court Cases of Litigation Rescinding JPO's Trial/Appeal Decision Concerning Patent
2015.03.20
Chapter 2: Inoventive Steps in the Chemical and Pharmaceutical Fields
2015.02.01
Reading of U.S. Supreme Court Cases: Commentary on Intellectual Property and Business Cases in the 21st Century
2014.11.20
Antibody Drugs: "Correction of Error" in a Claim That Includes Identification Based on Amino Acid Sequence
2014.11.10
U.S. Supreme Court Decision in the Myriad Case and Its Implications
2014.09.05
Article 10 (Orders to Protect Confidentiality); Article 11 (Rescission of Protective Orders)
2013.08.10
U.S. Supreme Court Decision in the Myriad Case (June 13, 2013) -- Eligibility of Gene Patents as Subject Matter of Patent Protection
2012.04.11
Ⅲ-2. Claims by Multiple Rightsholders
2011.10.05
Scope of "Action Involving Patent Right" -- Freezing System Case
2010.11.19
Ⅲ. Exhaustion of Patent Right -- Ink Cartridge Case
2007.06.25
Chapter 3, Section 1, Ⅲ. Research/Technology Service Contracts
2007.05.01
Commentary on FTA/EPA Negotiations
2006.04.01
Guide to International Legal Practice (1) to (11)

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SeminarsArchives

2026.02.17
JPAA Symposium Commemorating the 20th Anniversary of the Accreditation System for Conducting Specified Infringement Litigation Representation Services; Pannel Discussion "Recent Intellectual Property Infringement Litigations"
2025.09.18
【Online Seminar】AI and other Digital Technology, as well as Legal Developments (3): Legal Considerations in Providing AI-Based Services
2024.12.19
【Online Seminar】Intellectual Property Rights and Utilization Thereof That You Should Know to Strengthen Branding Strategy
2024.11.15
Decision of the Court of First Instance of the Unified Patent Court, Central division (Section Munich) on July 16, 2024 459505/2023 (UPC_CFI_1/ 2023)
2024.10.17
【Online Seminar】 Liabilities of Individual Directors on the Ground of IP Infringement - Trends of Court Decisions and Actions to be Taken in Practice
2024.02.29
U.S. Dispute Cases Involving Antibody-Drug Conjugate (ADC)
2023.12.14
【Onilne Seminar】Damage Compensation in Intellectual Property Right Infringement Cases - Recent Trends in Court Decisions and Practical Responses Thereto
2023.01.26
Ideal Way to Protect Genetic Resources, Including Plant Varieties
2022.07.22
【Online Seminar】Protection of Intellectual Property Rights in Russia concerning the Rights of Holders in "Unfriendly Countries" - Influence Arising from Russia's Measures against Economic Sanctions -
2022.01.12
【Onilne Seminar】Series of Seminars on Latest Court Decisions (8): Latest Court Decisions on Intellectual Property
2021.10.21
Judicial Symposium on Intellectual Property (JSIP) Tokyo 2021 -- IP Dispute Resolution in Asia -- Program by Ministry of Justice: "Civil Suits Involving Trademark Infringement"
2021.08.27
【Online Seminar】IP Case Update for Practical Use
2020.11.30
Court Case Study on Invention of Antibody Drugs Defined by Using Functional Descriptions
2018.12.10
【Nagoya】Points in Drafting a Joint R&D Agreement: Learning through Dispute Case Studies
2018.09.18
Points in Drafting a Joint R&D Agreement: Learning through Dispute Case Studies
2018.05.30
【Osaka】Understanding in 90 Minutes! - Overview of the Changes Made to the Employee's Invention Reward System by the 2015 Amendment to the Patent Act and Remaining Issues
2018.02.27
Recent Developments regarding the Doctrine of Equivalents in Japan, the United States and China
2018.02.21
JPAA Patent Committee Open Forum 2017: "Points to Note Concerning Patent Specifications Based on Recent Court Decisions -- From the Perspective of Patentability and Fulfillment Theory"
2017.09.08
Points to Note in Non-Disclosure Agreements
2017.07.10
Litigation Rescinding JPO's Trial/Appeal Decision in the Pharmaceutical and Biotechnology Fields -- Recent Court Cases
2016.11.29
Technical Standards and Intellectual Property
2016.07.13
Practice of Intellectual Property Infringement Litigation -- Focusing on Pharmaceutical, Biotechnology, and Chemical Fields
2010.07.22
Intellectual Property Training Seminar Series, 8th Session: "Multiple Rightsholders"
2003.11.26
Industry-Academia Collaboration Seminar, 1st Session: "Infringement of Rights and Litigation"

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