Firm Overview

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Aoyama & Partners is a leading IP law firm in Japan, practicing globally in the field of intellectual property. Founded in 1965, the firm has grown to be one of the largest IP law firms in Japan. We provide superior services with sincerity to our clients all over the world.

[ Practice Areas ]

Our practice areas cover full range of IP matters in Japan and other countries, including the followings.
  • All affairs related to filing, prosecution, and validation of rights of Patent, Utility Model, Design and Trademark (including service mark)

    Search, filing and prosecution, maintenance, opposition, trials for correction, invalidation or the like, evaluation of IP rights, award, etc.

  • All activities of disputes and litigation related to Patent, Utility Model, Design, Trademark (including service mark) and Specified Unfair Competitions

    Infringement lawsuit (including injunction and provisional injunction), lawsuit for canceling a trial decision, arbitration/mediation, negotiation for settlement, customs enforcement of IP rights, etc.

  • Drafting and negotiating contracts related to IP rights

    License agreement, transfer/assignment agreement of IP rights, joint research/development agreement, etc.

  • Others

    Consulting services on IP matters, deposit of microorganisms, copyright registration of computer program or the like, etc.

[ Technical Areas ]

Our expertise extends to all of technical areas, including the followings.
  • Life ScienceLife Science

    - Life Science -

    pharmaceuticals, agrochemicals, biotechnology, foods, etc.

  • Chemistry and Materials ScienceChemistry and Materials Science

    - Chemistry and Materials Science -

    organic and inorganic chemistry, polymer science, semiconductor materials, metals, ceramics, fibers, etc.

  • Electronics and ITElectronics and IT

    - Electronics and IT -

    electric/electronic circuits, control engineering, semiconductor engineering, etc.

  • Mechanical EngineeringMechanical Engineering

    - Mechanical Engineering -

    industrial machinery, precision machinery, plant installation, medical devices, household appliances, commodities, etc.

[ Firm Profile ]

Name AOYAMA & PARTNERS
Establishment September 4, 1965
Co-CEO Hiroshi TAMURA, Norihito YAMAO
Senior Counsel Tamotsu AOYAMA
Yasuo TAMURA
Mitsutaka IWASAKI
Mutsumi SAMEJIMA
Takuji YAMADA
General Manager of Tokyo Office Shozo UEMURA
Location

Osaka Umeda Twin Towers North 41st floor,
8-1, Kakuda-cho, Kita-ku, Osaka 530-0017 JAPAN
TEL: (81)6-6316-1261
FAX: (81)6-6316-2241

[Tokyo Office]
Toranomon Seiwa Building 8th floor,
2-3, Toranomon 1-chome, Minato-ku, Tokyo 105-0001 JAPAN
TEL: (81)3-6478-8647
FAX: (81)3-6478-8675

[ Milestones ]

April, 2018 Mr. Hiroshi TAMURA and Mr. Norihito YAMAO, patent attorneys, became Co-CEO’s.
November, 2015 Tokyo office moved to Shosen Mitsui Building, Minato-ku,Tokyo.
February, 2013 Osaka office moved to Osaka Umeda Twin Towers North in Kita-ku, Osaka city.
January, 2012 Mr. Mutsumi SAMEJIMA, a patent attorney, became the fourth chief executive officer.
December 2007 Tokyo office moved to Kasumigaseki Building, Chiyoda-ku, Tokyo.
August, 2006 Mr. Mitsuo TANAKA, a patent attorney, became the third chief executive officer.
June, 2002 Mr. Osamu KAWAMIYA, a patent attorney, became the second chief executive officer.
January, 2001 Opened Tokyo office in Torano-mon in Minato-ku, Tokyo.
March 1994 Moved to IMP Building in Osaka Business Park, Shiromi, Chuo-ku, Osaka city.
November, 1986 Moved to Twin 21 MID Tower in Osaka Business Park, Shiromi, Chuo-ku, Osaka city.
February, 1982 Mr. Mitsunosuke MIZUSHIMA passed away and the firm name was changed to "AOYAMA & PARTNERS."
April, 1978 Installed a computer-aided docketing system.
June, 1973 Started an overseas training program.
June, 1969 Moved to Honmachi Building in Higashi-ku, Osaka city.
April, 1967 Mr. Mitsunosuke MIZUSHIMA, an attorney at law, joined the firm and the firm name was changed to "MIZUSHIMA & AOYAMA LAW AND PATENT FIRM."
September, 1965 Mr. Tamotsu AOYAMA established "AOYAMA PATENT FIRM" in Maeda Building, Higashi-ku, Osaka city.
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Founder / Tamotsu AOYAMA (center), Co-CEO / Norihito YAMAO(left-side), Hiroshi TAMURA(right-side)