Name Kitazawa & Koizumi
Established August 1, 1989
Representatives Teppei Fukumoto
Ka-Hae Kim
Personnel Patent attorneys: 5 (3 men and 2 women)
Technical staff: 4 (2 men and 2 women)
Administrative staff: 4 (1 man and 3 women)
Location Ochanomizu Union Bldg. 6F
2-1-20 Kandasurugadai
Chiyoda, Tokyo 101-0062, Japan
Contact Tel.: +81-3-6275-0736
Fax: +81-3-6275-0737
Areas of Practice Application filing for domestic/foreign patents, utility models, designs, and trademarks; appeals; expert opinions; and searches
Breakdown of Services Foreign filing (83%) Domestic filing (11%) PCT filing (6%)
Patent (97%) Utility Model (2%) Trademark (0.8%) Design (0.2%)
* More detailed information is provided under our business profile.
Areas of Expertise Mechanical and electrical engineering, physics, information technology, materials science, optics, and control technologies
Professional Memberships and Activities
  • Member of the Japan Patent Attorneys Association
  • In-house study sessions (approximately once per month)
  • Participation in workshops led by overseas representatives on litigation cases, amendments to patent laws, and patent laws in other countries


Kitazawa & Koizumi

Kitazawa & Koizumi was established on August 1, 1989 to provide quality service to clients in Japan with a focus on filing patent applications overseas in electrical and mechanical fields. Our firm has worked to build trust with its clients by carefully drafting patent specifications as well as written arguments, amendments, and other intermediate documents through frequent meetings and thorough communication with the client. We have also filed numerous applications in Japan on the request of our overseas clients and have earned their trust and the trust of their patent attorneys.

On September 16, 2016, twenty-seven years after our law firm was established, we completed the process to convert our entity type to a patent professional corporation in order to strengthen our management structure and ensure that our clients will continue to receive the same reliable service. Following this entity conversion, two of our members Teppei Fukumoto and Ka-Hae Kim were made partners and now form the nucleus of our management team. The original founders Kazuhiro Kitazawa and Shin Koizumi continue to take part in management decisions as advisors/consultants. There have been no changes in the content of our services or the firm’s personnel composition as a result of this status change.

We are committed to providing the same quality service to our clients following this change in status while always striving for improvement, and we ask for your continued patronage.