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

Cookies Settings

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 reveals how its litigation strategies informed the arguments that took Masimo’s judgment past $818 million
The firm was rebuilding its IP practice through a string of patent hires and a Texas expansion, but its dissolution has put the newly built talent back into the market
AI can exploit longstanding gaps in copyright protection at remarkable speed, but EU law still provides tools to fight back, says Simon Hembt at Bird & Bird
The firm has tapped a local patent trio to establish a foothold in the market and broaden its national presence
New Asia-Pacific IP head Jonathan Chu is eyeing opportunities arising from Chinese technology licensing, overseas enforcement and increasingly IP-heavy cross-border deals
Europe’s largest intellectual property convention and trade fair is back: IP Service World 2026 takes place in Munich from November 23–25 – the 16th edition, with 1,400-plus attendees from 55-plus nations, 100-plus speakers, and 100-plus exhibitors. Three days. Two focused areas. One IP marketplace.
Mehmet Gün and Uğur Aktekin discuss four decades of change in Türkiye’s legal market, the firm’s commitment to independence and the challenge of building an institution that can outlast its founders
Boehringer Ingelheim has instructed a team from Kirkland, while Teva is being represented by Pinsent Masons
The Delhi High Court’s latest directions offer an opportunity to move beyond remedies against bad-faith registrations and address how suspicious applications are identified in the first place, says Fatima Baig at Lexlinc
Camilla Hamrin describes how the acquisition by Acapo Onsagers will impact Bergenstråhle’s trademark practice – and reflects on changes she has seen over 30 years in IP
Gift this article