Japanese Patent Attorneys | Allegro IP Law Firm

Japanese intellectual property law firm working with clients from overseas

Firm Overview

Allegro IP is a unique and exclusive Japanese intellectual property law firm that carries out the missions of supporting overseas clients’ business in Japan with IP rights.
Although we are relatively a small boutique firm, we guarantee that experienced patent attorneys methodically handle patent and trademark filings and prosecutions one by one.
We do not expand our scale with the aim of i) quick decision-making; ii) quality maintenance; and iii) clarification of responsibility.

About Us

Allegro IP is a boutique IP law firm in Japan focusing on IP rights for overseas clients

IP Attorneys

18+ years of experienced IP attorneys handle cases before the Japan Patent Office


We have tried to offer as high quality and expedient IP services as possible from the start of our firm


Clients are always kept informed of any charges in a clear way and our service fees are competitive

Client Breakdown 2020

1 %
overseas Corp./univ.
1 %
overseas IP firm
1 %
Japanese Corp./univ.
1 +
from countries
1 +
rep. applicants
1 +
tech. field

We Will Help You Every Step Of The Way

Why global companies choose Allegro IP?

IPR Specialization

Allegro IP is a boutique intellectual property law firm in Japan specializing in patent and trademark filing and prosecution to support overseas clients.

Inbound Only

Firm’s system and strategy are streamlined to focus on intellectual property rights in Japan for overseas clients. Our goal is to support clients in effectively utilizing IP rights.

Urgent Matter

We are always conscious of being highly responsive and we prepare and file documents before the Japan Patent Office within a few hours in urgent cases.

Email Contact

We communicate with clients mostly via email and sometimes zoom. Please do not hesitate to contact us at any time without considering time differences.

Transparent Billing

We prepare and issue invoices promptly and we prepare estimates in advance for costly cases. We accept credit card payment through Paypal upon request.

Elite Team

Only patent attorneys with 18+ years of experience are in charge of overseas clients’ cases. Unlike other firms, there are no associates/paralegals.

Inhouse Translation

Only experienced patent attorneys are in charge of translation services so that the clients may proceed with later prosecution smoothly and seek strong IP rights.

Filing Confirmation

We report on each filing before the Patent Office immediately together with official receipt and filed document so that clients enjoy our services without anxiety.

Backup Service

If clients find any unsatisfactory issues with our services, plural partner attorneys will be willing to work over the cases as they deem necessary at no additional cost.