Five minutes with … Hiroyuki Hagiwara, Paul Hastings

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 … Hiroyuki Hagiwara, Paul Hastings

HAGIWARA, Hiroyuki_Paul Hastings 2.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 Hiroyuki Hagiwara, partner at Paul Hastings in Tokyo.

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

I am a lawyer licensed in New York, Texas, and the USPTO. My specialisation lies in the field of IP, particularly in high-tech and pharmaceutical-related matters. This includes dealing with integrated circuit chips, computers and their components, smartphones, and prescription drugs. Most of my matters have international or cross-border components which, I think, add an extra level of excitement to my work.

Talk us through a typical working day.

I am based in Tokyo and work with clients in Japan, the US, and Europe. The majority of my teammates are located in the US, so my workday starts early in the morning. The first thing I do is check my work emails and texts. I respond to anything urgent or that requires immediate attention, and then I take a moment to enjoy a cup of coffee and walk to the office. I typically have a bunch of calls and meetings in the morning with my teammates, and then more in the afternoon with clients. Alongside these meetings, I spend time reviewing and drafting legal briefs, expert reports, and other court documents.

To maintain a balanced lifestyle, I go to yoga practice a few days a week. On a busy day, I have a few more calls in the evening.

What are you working on at the moment?

We have an appeal of inter partes review petitions which our team dominantly succeeded on, and we were able to stay US District Court proceedings while the appeal is pending.

Additionally, we have a couple of out-licensing matters for international electronics clients. These matters involve licensing hundreds of electronics and nanotechnology patents. On matters such as these, I collaborate closely with the patent teams of our clients, as well as with outside experts and my teammates across the world. This collaborative approach makes the work incredibly interesting and engaging. We are also assisting a client to divest some of the assets from their large portfolio of IP.

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

Typically, I am juggling multiple client matters simultaneously. Matters go through life cycles, and typically at any given moment some are more active while others are quieter. Of course, sometimes everything gets busy at once!

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

The most exciting aspect of my role is counselling clients directly on their critical matters and devising strategies tailored to achieving their goals. We then execute these strategies alongside our clients, collaborating with witnesses and judges. I think a key challenge, as for all businesses, is ensuring the stability and continued growth of our practice through adverse economic cycles or macroeconomic and geopolitical events.

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

Expertise and judgment.

What is the most common misconception about IP?

That IP owners are satisfied once their patents are issued or trademarks are registered. While that can be the case, it is important that IP owners have a clear strategy, action plan, internal team, and budget to effectively utilise, monetise and enforce their rights. Without proper enforcement, these assets may become a negative cash flow component on the balance sheet.

What or who inspires you?

People with forward-looking, positive attitudes.

If you weren’t in IP, what would you be doing?

I can’t imagine a situation where I was not immersed in the world of IP. I decided to pursue a career in IP when I was 21, after extensive self-reflection and outward research. I have loved it ever since.

Any advice you would give your younger self?

Stay positive and keep at it.

more from across site and SHARED ros bottom lb

More from across our site

After two decades at Kass International, Geetha Kandiah discusses the lessons that shaped her career, building an inclusive regional firm, and AI opportunities
Manisha Singh of LexOrbis discusses the need for commercial alignment with clients and why IP lawyers need to have curiosity at their core
As firms expand into integrated IP services, recent hires show the model's appeal – but high-profile departures reveal how quickly questions of depth and durability can emerge
In-house counsel say private practice firms either aren’t conveying sustainability messaging or simply ‘don’t care’, but a mindful approach to the topic could swing pitches
With patent filings stagnant, fewer clients litigating and market consolidation at play, Canadian firms are considering how to challenge the established players
IPH’s strategy of integrating acquired businesses into its larger premium brands, may offer an early signal of how externally funded IP firms will pursue scale, efficiency and market strength
After bringing on board three new partners, the recently merged firm has its eyes on breaking into the top-flight of firms for patent disputes and ITC litigation
While the US and the UK remain the biggest markets for representation of women, their lead has narrowed
Former professional cricketer Ben Scott talks through the challenges of building a legal tech platform, transitioning from sportsman to entrepreneur and why he believes he has found a gap in the market
The benefits of offering a range of services, innovative enforcement approaches, and gradual AI adoption are all helping SyCip Salazar Hernandez & Gatmaitan develop its IP offering
Gift this article