The following table shows the ranking of Japanese IP law firm. The ranking is based on the following conditions.

  • Technical field:  Biotechnology (Protein, amino acid, DNA, RNA, Recombinant DNA, antibody, peputide, iPS cell, ES cell, vaccine, etc.)
  • Status:  All (i.e., Japanese patent applications in 2016 (application date)).
  • First country:  All (i.e., patent applications with claiming priority of a Japanese application or a foreign application, or without claiming priority).
  • Count:  The number of Japanese patent applications handled by each Japanese IP law firm was counted (applicants of the patent applications are represented by each Japanese IP law firm or its members).
RankingNo.IP law firmWebsite
1714SHUSAKU・YAMAMOTO View
2432Shimizu Patent Office View
3348SHIGA International Patent Office View
4341Hiraki & Associates View
5282Aoyama & Partners View
6236Abe, Ikubo & Katayama View
7218SEIWA PATENT & LAW View
8184YUASA AND HARA View
9135Nakamura & Partners View
10135Sonoda & Kobayashi View
11129Soei Patent & Law Firm View
12127SAEGUSA & Partners View
13105Takaoka IP Law View
14104Takashima International Patent Office View
15102KAWAGUTI & PARTNERS View
16101TSUKUNI & ASSOCIATES View
1790Kuzuwa & Partners View
1890YuNeed International Patent Office View
1986TMI Associates View
2083SUGIMURA & Partners View
2180Asamura Patent Office, p.c. View
2277KYOWA PATENT AND LAW OFFICE View
2375SUBARU PATENT OFFICE View
2469The Patent Corporate Body Aruga Patent Office View
2568Orion Patent Office View
2668Anderson Mori & Tomotsune View
2766SIKs & Co. View
2866IP Firm SHUWA View
2962HARAKENZO WORLD PATENT & TRADEMARK View
3060TAIYO, NAKAJIMA & KATO View
3157Hirota & Associates View
3256ONDA TECHNO Intl. Patent Attys View
3351OHNO & PARTNERS View
3445Hirota, Nagare & Associates View
3545Shobayashi International Patent &Trademark Office View
3643Okuyama & Sasajima View
3739Tanigawa and AssociatesNone
3837SUZUYE & SUZUYE Intellectual Property Law View
3937Isono International Patent Office, P. C. View
4035KIYOHARA & CO.,PATENT ATTORNEYS View
In preparing the table, a patent search expert conducted a patent search using patent classification and keywords (as necessary) in order to extract patents in specific technical field (here, Biotechnology field).
In the patent search, it was confirmed that a high-accuracy population (i.e., a population not including non-relevant fields) of patents was obtained. Subsequently, the population was used to create the table.

By entering the Firm name or Attorney name in the "Legal Representative Name" column of Patentscope (search system of WIPO), you can find the patent information handled by each Firm.

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