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 2026

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

The firm has hired former in-house counsel Quintin Cassady to lead the launch of the new office
The combined firm has strong IP credentials across the US, Middle East, UK and Europe, despite Taylor Wessing’s German and French practices not joining
Priya Nagpal, who this month became the firm’s eighth IP partner, says its cross-practice expertise in areas closely linked to IP was a key draw
Harm van der Heijden is to join Ankar AI as head of patent innovation after 17 years in private practice
Alabama attorney Miya Aladebumoye has launched a new firm built on ‘big law’ experience and a personal touch approach
A UKIPO campaign aimed at combating fakes in the pre-loved fashion market and registration of the first Portuguese craft and industrial geographical indication were also among the top talking points
Chris Adams, Managing IP’s research lead, joins us to explain what practitioners need to know ahead of our first rankings release of 2026
Another IP litigator joins Winston & Strawn in Dallas as firm seeks to keep pace with ‘rapid’ growth of Texas market
Anthony O'Malley will replace Andrew Blattman at IPH, which owns several large IP firms across Australia, Asia and Canada
Barry Greenbaum, partner at Olshan Frome Wolosky, explains how in-house teams can update their approach to brand development, and where AI can add value
Gift this article