事業所案内

Firm Overview

Founded on May 1, 1978, by Patent Attorney Kenji Yoshida, YKI Intellectual Property Attorneys has been dedicated to providing comprehensive intellectual property services for nearly half a century.

Our Services

Acquisition of Intellectual Property Rights

Invention discovery, prior art searches, filing of patent, utility model, design, and trademark applications, responses to office actions, and rights maintenance, etc.

Dispute Resolution for Intellectual Property

Negotiations, expert opinions, investigations, oppositions, trials, expert determinations, arbitration, mediation, litigation, and customs enforcement procedures, etc.

Consulting Services for Intellectual Property

License and assignment agreements, anti-counterfeiting strategies, and copyright-related consultations, etc.

Intellectual Property Seminars and Training

Insights into examination trends in Japan and abroad, analysis of recent court decisions, and intellectual property education, etc.

Outline

Name
YKI Intellectual Property Attorneys
Establishment
May 1, 1978
Founder, Managing Partner
Kenji Yoshida
Senior Adviser, Managing Partner
Jun Ishida
President
Kimio Kamiyama
Location
Tokyo Office (Main Office):
1-34-12 Kichijoji Honcho, Musashino-shi, Tokyo 180-0004, Japan
Tokyo Office (Annex Office):
Askonamie Bldg. 8F, 2-2-5 Kichijoji-Minami-cho, Musashino-shi, Tokyo 180-0003, Japan
Osaka Office:
Meijiyasudaseimei Bingocho Building 4F, 1-6-15 Bingocho, Chuo-ku, Osaka 541-0051, Japan

More

Our History

May 1,1978
Founded in Shinjuku by Patent Attorney Kenji Yoshida as Yoshida Patent Office.
1983
Relocated within Shinjuku due to business expansion.
1988
Patent Attorney Jun Ishida joined as Co-Agent.
1989
Kenji Yoshida received the Special Service Award from the Japan Patent Attorneys Association (JPAA) for the 90th anniversary of the Patent Attorney System.
1993
Kenji Yoshida was appointed Vice President of the JPAA.
April 1994
Relocated to a newly constructed office building in Kichijoji, Musashino City.
Introduced intranet and LAN systems to improve efficiency.
1994
Kenji Yoshida received Special Recognition from the JPAA.
2001
Opened a branch office near the main office.
August 2002
Renamed to YKI Intellectual Property Attorneys.
April 2004
Annex office relocated and reestablished as the “Second Office.”
November 2005
Opened the Osaka Office in the Midosuji area.
2009–2012
Kenji Yoshida served as President of the Asian Patent Attorneys Association (APAA).
April 2014
Jun Ishida appointed President.
2016
Received the Imperial Invention Award (Patent No. 4458126).
April 2020
Osaka Office relocated to Bingo-machi, Chuo-ku, Osaka.
July 2024
Kimio Kamiyama appointed President.

Access

Tokyo Office (Main Office)

1-34-12 Kichijoji Honcho, Musashino-shi, Tokyo 180-0004, Japan

Traffic Access

5 min walk from the North Exit of Kichijoji Station (JR Chuo Line / Keio Inokashira Line)

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Tokyo Office (Main Office)

Tokyo Office (Annex Office)

2-2-5 Kichijoji Minami-cho, Musashino-shi, Tokyo 180-0003, Japan
Askonamie Building 8F

Traffic Access

3 min walk from the South Exit of Kichijoji Station (JR Chuo Line / Keio Inokashira Line)

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Tokyo Office (Annex Office)

Osaka Office

1-6-15 Bingo-machi, Chuo-ku, Osaka 541-0051, Japan
Meiji Yasuda Seimei Bingocho Building 4F

Traffic Access

・3 min walk from Sakaisuji-Hommachi Station (Exit 12, Osaka Metro)
・8 min walk from Kitahama Station (Exit 5, Keihan / Osaka Metro)
・8 min walk from Honmachi Station (Exit 1, Osaka Metro)

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Osaka Office