RYUKA IP LAW FIRM > Firm Overview


Shinjuku L Tower 22nd Floor, 1-6-1 Nishi-Shinjuku,
Shinjuku-Ku, Tokyo, 163-1522, JAPAN
TEL: +81-3-5322-6375
FAX: +81-3-4586-7302

Our Team
Total Number of Employees 96
Attorneys 41
Japanese Patent Attorneys 33
・Electrical Engineering, Electronics, Software 24
・Chemical, Materials Science 7
・Mechanics, Optics 18
・Biotechnology 7
Trademark Attorneys 2
Design Attorneys 5
US Attorneys 7
・Patent Attorneys 5
Chinese Attorneys 2
・Patent Attorneys 1

– Nearly all specialists are either attorneys or Ph.D.
– Numbers include overlaps, contracted employees and those of group companies

Number of Applications Represented by RYUKA per year
Number of Applications Represented by RYUKA per year

The total number of domestic and foreign applications per year for patents, utility models, designs, and trademarks by both national and foreign applicants.
International applications into or out of Japan are based on the nationalization date, pending applications transferred to our firm are based on the date of transferring, and all others are based on their actual filing date.

Our Services


Patents, Trademarks, Designs

■Technical Expertise

Information Technology, Software, Electrical Engineering, Electronics, Telecommunications, Mechanics, Optics, Biotechnology

■Legal Services

Patent Searches, Infringement or Non-Infringement Opinions, Negotiation, and Licensing

■Consultation Service

Full-service IP consultations from the invention harvesting, prosecution strategies to the post-grant IP managements

RYUKA Patent Translation Incorporated

The company provides high-quality translation of specifications for patent prosecutions. Our self-developed software, RYUKA Translation Assistant, assists the translators to consistently translate the applications, although it does not translate the applications by itself. The assisting software has significantly reduced translation fees and improved quality. Only specialized international IP law firms can provide such high-quality, cost-efficient translation.

RYUKA IP Conference Hall

RYUKA IP Conference Hall provides a platform for distributing and sharing IP-related information and essential updates from all over the world. For those who share similar visions and interests to us, we are happy to provide this space for events free of charge.

Room Size
81.15 square meters

Seat Number
40 to 70 seats depending on arrangement


  • Screen
  • Projector
  • Wi-Fi
  • Wireless Microphone
  • Whiteboard
  • Laser Pointer

Other equipment may be available upon request.

Window View