Five minutes with … Tsuyoshi Sueyoshi, Yuasa and Hara

Managing IP is part of Legal Benchmarking Limited, 1-2 Paris Gardens, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2025

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement

Five minutes with … Tsuyoshi Sueyoshi, Yuasa and Hara

Tsuyoshi Sueyoshi.JPG

Each week Managing IP speaks to a different IP lawyer about their life and career

Welcome to the latest instalment of Managing IP’s ‘Five minutes with’ series, where we learn more about IP lawyers on a personal as well as a professional level. This time we have Tsuyoshi Sueyoshi, partner at Yuasa and Hara in Tokyo.

Someone asks you at a party what you do for a living. What do you say?

Academic mercenary (person for hire) or part-time staff officer in contentious matters or negotiations.

Talk us through a typical working day.

Attending one or more meetings with a client(s), drafting briefs for lawsuits and/or invalidation actions, preparing advice and opinions to questions to clients, searching for evidence, studying precedents and academic literature.

What are you working on at the moment?

Drafting a complaint. The deadline is approaching.

Does one big piece of work usually take priority or are you juggling multiple things?

I juggle multiple tasks until 5:30 pm before focusing on one big piece after 5:30 pm. During business hours, it is difficult to focus on one heavy task, because of interruptions.

What is the most exciting aspect of your role and what is the most stressful?

Winning in disputes, the conclusion or closing of agreements, and completing draft papers are among the most exciting.

Approaching deadlines is the most stressful.

Tell us the key characteristics that make a successful IP lawyer.

Interest and understanding in science and technology. Putting forward logical arguments.

What is the most common misconception about IP?

IP rights are fragile and artificial. Some people believe that once a patent is granted it is solid. However, when an opposing party finds buried but competent prior art, a patent can be invalidated.

What or who inspires you?

Questions from clients.

If you weren't an IP lawyer, what would you be doing?

I'd be a researcher or a scientist.

Any advice you would give your younger self?

Tomorrow is another day.

more from across site and SHARED ros bottom lb

More from across our site

Tilleke & Gibbins topped the leaderboard with four awards across the region, while Anand & Anand and Kim & Chang emerged as outstanding domestic firms
News of a new addition to Via LA’s Qi wireless charging patent pool, and potential fee increases at the UKIPO were also among the top talking points
The keenly awaited ruling should act as a ‘call to arms’ for a much-needed evolution of UK copyright law, says Rebecca Newman at Addleshaw Goddard
Lawyers at Lavoix provide an overview of the UPC’s approach to inventive step and whether the forum is promoting its own approach rather than following the EPO
Andrew Blattman, who helped IPH gain significant ground in Asia and Canada, will leave in the second half of 2026
The court ordering a complainant to rank its arguments in order of potential success and a win for Edwards Lifesciences were among the top developments in recent weeks
Frederick Lee has rejoined Boies Schiller Flexner, bolstering the firm’s capabilities across AI, media, and entertainment
Nirav Desai and Sasha S Rao at Sterne, Kessler, Goldstein & Fox explore how companies’ efforts to manage tariffs by altering corporate structures can undermine their ability to assert their patents and recover damages
Monika Żuraw, founder of Żuraw & Partners, discusses why IP should be part of the foundation of a business, and taking on projects that others walk away from
Lawyers say attention will turn to the UK government’s AI consultation after judgment fails to match pre-trial hype
Gift this article