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:  Japanese granted patents in 2018 (registration date).
  • First country:  Foreign (i.e., patents with claiming priority of a foreign application, or patents based on PCT application whose receiving office is not Japan Patent Office without claiming any priority).
  • Count:  The number of patents handled by each Japanese IP law firm was counted (if the applicant is represented by a firm member (attorney), it was counted as being handled by the firm).
RankingNo.IP law firmWebsite
1494SHUSAKU・YAMAMOTO View
2294Shimizu Patent Office View
3243Aoyama & Partners View
4220Abe, Ikubo & Katayama View
5215SEIWA PATENT & LAW View
6198SHIGA International Patent Office View
7185Nakamura & Partners View
8167YUASA AND HARA View
9158Hiraki & Associates View
10122KAWAGUTI & PARTNERS View
11106Kuzuwa & Partners View
12106Takaoka IP Law View
13103Soei Patent & Law Firm View
1499Sonoda & Kobayashi View
1594SUBARU PATENT OFFICE View
1675TSUKUNI & ASSOCIATES View
1763Anderson Mori & Tomotsune View
1860Asamura Patent Office, p.c. View
1958ONDA TECHNO Intl. Patent Attys View
2055Orion Patent Office 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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