Minako Matsuyama

IAM Research

The Patent 1000 focuses exclusively on patent practice and has firmly established itself as the definitive 'go-to' resource for those seeking world-class legal patent expertise.

Silver - Individuals: prosecution

Celebrating its 120th anniversary in 2022, the venerable Yuasa and Hara’s IP division is a magnet for marquee clients in both prosecution and litigation. “Yuasa and Hara produces great results while dealing with complex patent invalidation cases. It is cost-effective, too.” “The lawyers have scientific backgrounds and are highly capable of handling disputes. They have an excellent track record.” While managing partner and co-head of the patent division Minako Matsuyama specialises in all things related to chemistry, no technical field poses a challenge for her: testament to this is her prosecution work for giants such as Ebara Corporation, with a remarkably high grant rate. On the contentious side, the outfit's forte is cutting-edge technologies, such as OLED displays and molecules and antibodies. Pharmaceutical licensing is another keystone. Former chief judge of the IP High Court of Japan Toshiaki Iimura spearheads the practice's law division. Throughout his 40-plus years in the business, Iimura has contributed to shaping Japan’s IP landscape through his publications and opinions exchanged with patent offices around the world. “Mr Iimura is a very strong opponent in court,” comments one peer. Kozo Yabe excels in software-related infringement cases, while fellow litigator and doctor of chemistry Tsuyoshi Sueyoshi is an accomplished life sciences specialist, trusted by the biggest names in the pharma industry and beyond. He recently successfully represented JNC against DIC in an invalidation trial at the IP High Court and partially revoked a BASF patent in favour of Nissui. “Mr Sueyoshi combines impressive scientific skills with a high ability to deal with patent disputes. He is a capable lawyer who proposes appropriate strategies based on his deep legal knowledge and complete understanding of science and technology. His time management is impeccable.”

Unlock unlimited access to all IAM content