Intellectual Property: Domestic
Asia-Pacific Guide 2025 : Japan
Band 1
Contact number
+81-3-6775-1000About
Provided by Anderson Mori & Tomotsune
Anderson Mori & Tomotsune’s Intellectual Property Practice Group is made up of attorneys-at-law (bengoshi) and patent attorneys (benrishi).
Our IP attorneys (bengoshi) are veterans in patent litigation and have extensive experience in IP licensing and transactions. They possess deep technical knowledge in the areas of electronics, telecommunications, computers, machinery, chemicals, biotechnology, and pharmaceuticals. Our lawyers also have deep expertise in the handling of know-how, trademark, copyright, and entertainment disputes. They work closely with the firm’s specialists in other practice areas such as competition law, labor law, corporate law, cross-border transactions, bankruptcy, and pharmaceutical regulations, as required by the nature of the cases they handle.
Our patent attorneys (benrishi) specialize in the filing of patents, utility models, designs, and trademarks. These professionals are qualified to appear before the Japan Patent Office for patent prosecution proceedings and provide our clients with advice and consultations on the various aspects of Japanese intellectual property law. The members of our patent prosecution team hail from a variety of professional, technical, and academic backgrounds and are on the cutting edge of both technology and IP regulations.
Chambers Review
Anderson Mori & Tomotsune has a flourishing team with well-honed skills in an array of IP issues, especially in relation to patent infringement disputes and invalidation actions. The firm also advises on a range of transactional matters, licensing agreements and trade secrets disputes. The team's work includes mandates for both domestic and international companies, including on cross-border mandates. It assists clients from a wide range of industries, including the automotive, pharmaceutical and semiconductor sectors. The team includes qualified benrishi who assist clients with patent filing mandates.
Work Highlights
- Anderson Mori & Tomotsune represented AstraZeneca in a patent infringement action filed by Ono Pharmaceutical seeking to enforce a patent covering antibody drugs against cancers.
Strengths
Provided by Chambers
"AMT is very knowledgeable about complex technologies, responsive to clients' requests and well coordinated with attorneys in other countries."
"A well-balanced team of talented, young, mid-level and senior players ensures both speed and quality."
"The quick turnaround was excellent. The level of information and content provided was also very high."
"AMT is very knowledgeable about complex technologies, responsive to clients' requests and well coordinated with attorneys in other countries."
"A well-balanced team of talented, young, mid-level and senior players ensures both speed and quality."
"The quick turnaround was excellent. The level of information and content provided was also very high."
Notable Practitioners
Yasufumi Shiroyama heads Anderson Mori & Tomotsune's intellectual property practice group and is well regarded for his expertise in IP litigation, acting for a range of leading international companies. He regularly handles patent infringement disputes in district and appellate courts in Japan.
"His advice is practical and reasonable."
"The service met our expectations, and the content was at a very high level."
Miki Goto continues to attract recognition, particularly for handling patent disputes. He draws on his background in science and engineering to guide electronic and technology companies through intellectual property matters at the local and multijurisdictional level.
"He understands the situation quickly and proposes appropriate solutions."
"He is swift in providing accurate advice with his outstanding legal analysis skills."
"He is great both technically and legally."
Yoshikazu Iwase is an experienced patent disputes lawyer who represents domestic and international clients in venues including the Tokyo District Court.
"I was very pleased with Attorney Yoshikazu Iwase's work for us. He was responsive, reliable and trustworthy, and I valued his advice and guidance very much."
"He has a lot of experience and his advice is always insightful."
"Iwase-san is an excellent attorney and very responsive to clients' needs."
Ranked Lawyers at
Anderson Mori & Tomotsune
Japan