Who We Are

Masahiro Asamura
I became inaugurated as ASAMURA IP P.C., Director from May 2019. I entered the ASAMURA IP P.C. at that time in April 1999, and after being registered as a patent attorney in 2001,
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Ken Kanai
The ASAMURA IP P.C. responds quickly to customers’ needs for international intellectual property rights,
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Kiyoshi Asamura
With young leaders, we will strive to develop the traditional ASAMURA IP P.C. with the new era.
Read moreWe are top patent office in Japan
We have been experts in intellectual property since 1891. Today, we use our history, heritage and experience to help companies around the world get the results they want.
In the century we have been operating, advancements in technology have transformed the way we live, communicate and work. Over three generations we have adapted and continued to grow our expertise. Today, we are not only Japan’s longest-running patent office, we are a trusted IP partner to innovative companies from every corner of the globe.
Firm Name
ASAMURA IP P.C.
Address
Otemachi 1st Square West Tower 17F
1-5-1, Otemachi, Chiyoda-ku, Tokyo 100-0004, JAPAN
Phone :+81-3-6840-1536 (general)
Fax :+81-3-6840-1540
Management
Senior Managing Partner Masahiro Asamura
Managing Partner Ken Kanai
Senior Advisor Kiyoshi Asamura
Establishment
1891: Osaka Patent Agency in Kitahama, Osaka City was founded
2008: The company name is officially changed to Asamura Patent Office, p.c.
2022: The company name is offially change to ASAMURA IP P.C.
(For details, please refer to History of ASAMURA IP P.C.)
Our business is made up of:
Every member of our team is important, and we all work together to make each case a success. We make sure we appoint the right person for the job.
• Over 118 members
• 2 attorneys-at-law
• 37 patent attorneys (2 are licensed attorneys)
• 1 Chinese attorney-at-law
• 59 IP management technicians
Tier 1 – 2
Tier 2 – 23
Tier 3 – 34
• Over 3,000 business-related offices abroad
Our Services
Domestic Practice
Search, domestic application, registration, maintenance after obtaining rights (annuity management), expert opinion, trial, and other procedures related to intellectual property (patent, utility model, design, trademark, etc.)
Foreign and Domestic Practice
Representing foreign clients in all IP-related matters before the Japan Patent Office (JPO)
Litigation
Handling of domestic and international IP-related infringement lawsuits and countermeasures against them
IP Valuation
We offer Intellectual property valuation (AIVAS) services to measure the value and profitability of Japanese and foreign intellectual property







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