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Kyowa Patent and Law Office

Japan

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Key contacts
Managing Partner: Manabu Miyajima
Quick facts
Firm - Year of Establishment

1908

Number of Partners

9

Total Number of IP Practitioners

60

Languages Spoken at the Firm

Japanese, English, Chinese

Network Memberships

INTA, AIPPI, APAA, LES, JTA

Key practice areas
Intellectual property
Trade mark
Patent
Trade mark - domestic firms
Firm overview

Firm Profile

Kyowa Patent and Law Office was established on September 1, 1908, and is a full-service IP firm with more than 110 years of history.

Organization

Kyowa’s 60 patent attorneys, including five attorneys at law and one Chinese registered foreign lawyer, harmoniously cooperate to provide services tailored to each of its clients. Kyowa has six departments (see distribution of attorneys, some concurrently serving):

  • Electrical (20)
  • Mechanical (18)
  • Chemical (20)
  • Designs and Trademarks (12)
  • Litigations (5)
  • Chinese Market (4)

Highly qualified attorneys

Kyowa’s attorneys are graduates from high-ranking universities and specialists with rich knowledge in their field. Most of them have previous experience working in the R&D or patent section of major Japanese companies. Some have served as examiners for the JPO. Their wide range of technical expertise enables the firm to elaborate the best strategy for the protection of its clients’ innovations in view of Japanese patent practice.

Kyowa’s managing partner, Manabu MIYAJIMA, is an attorney at law admitted to both the State Bar of California and the Dai-Ichi Tokyo Bar. Ruoling DU, partner, is a Chinese-licensed lawyer who speedily and efficiently communicates with our Chinese clients with deeper understanding of Chinese society and culture.

Litigation

Kyowa provides various services in cases of litigation, disputes, and negotiations involving advanced technologies. While it is uncommon in Japan for attorneys at law to have technical background, most of Kyowa’s attorneys at law have master’s or bachelor’s degrees in engineering, pharmaceutics or other sciences. In the case of services such as infringement litigation, opposition, appeals against trial decisions, and contract negotiations related to patents and other intellectual property, our technical-background attorneys at law work together with our patent attorneys specialized in the technology relevant to the case. Their deep understanding of the technology allows them to make persuasive arguments in patent disputes which has proven beneficial in numerous litigations.

Practice Areas & Sector Specialisations
  • Key IP Areas

Copyright & related rights, Designs, Intellectual property (contentious), Intellectual property (prosecution), IP transactions, ITC litigation, Life sciences IP, Patent, Patent contentious, Patent prosecution, PTAB litigation, Trade mark, Trade mark contentious, Trade mark prosecution

  • Key Sector Expertise

Artificial intelligence, Biotechnology, Automotive, Renewable energy, Pharmaceutical, Robotics

Address:
Nippon Life Marunouchi Building
1-6-6, Marunouchi, Chiyoda-ku
Tokyo
Tel:+81332112321 Fax:+81332111710 Email:Contact Us Web Address:https://www.kyowapatent.co.jp/en/
2026 Edition
Patent prosecution - domestic firms
Tier 3
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Tier 3

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Overview

Kyowa Patent and Law Office is a full-service intellectual property firm based in Japan, offering comprehensive IP services to clients across various sectors, including AI, biotechnology, automotive, and pharmaceuticals. The team consists of patent attorneys, attorneys at law, and Chinese-registered foreign lawyer, specializing in patents, trademarks, designs, and IP litigation. The firm has a dedicated section for the Chinese market, adept at handling IP issues in China and providing in-depth services related to proceedings with the China National Intellectual Property Administration and other Chinese administrative agencies.

Notable patent practitioners: Hiroshi Sorimachi

Linked Reviews
Patent

Case studies show the team’s involvement in various patent filing and prosecution work.

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