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 2019 (registration date).
  • First country:  All (i.e., patents with claiming priority of a Japanese application or a foreign application, or without claiming 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
1525SHUSAKU・YAMAMOTO View
2336SHIGA International Patent Office View
3327Shimizu Patent Office View
4320Aoyama & Partners View
5281Hiraki & Associates View
6249Abe, Ikubo & Katayama View
7217SEIWA PATENT & LAW View
8194YUASA AND HARA View
9170Nakamura & Partners View
10149Soei Patent & Law Firm View
11134Takashima International Patent Office View
12124SAEGUSA & Partners View
13112TMI Associates View
14112Kuzuwa & Partners View
15111Sonoda & Kobayashi View
1697Takaoka IP Law View
1797KAWAGUTI & PARTNERS View
1895SUBARU PATENT OFFICE View
1983TSUKUNI & ASSOCIATES View
2079KYOWA PATENT AND LAW OFFICE View
2172TAIYO, NAKAJIMA & KATO View
2269IP Firm SHUWA View
2368ONDA TECHNO Intl. Patent Attys View
2467Anderson Mori & Tomotsune View
2565SIKs & Co. View
2664Shobayashi International Patent &Trademark Office View
2764YuNeed International Patent Office View
2863OHNO & PARTNERS View
2963Orion Patent Office View
3063The Patent Corporate Body Aruga Patent Office View
3161Hirota & Associates View
3257SUGIMURA & Partners View
3354Asamura Patent Office, p.c. View
3454HARAKENZO WORLD PATENT & TRADEMARK View
3551Sonderhoff & Einsel View
3644Okuyama & Sasajima View
3743Hirota, Nagare & Associates View
3841ITOH International Patent Office View
3940Ashida & Kimura View
4040NOGAWA PATENT OFFICE View
4138SUZUYE & SUZUYE Intellectual Property Law View
4237Kita-Aoyama International Patent Bureau View
4337Morita & Yamaguchi International Patent Office View
4437Fukami Patent Office, P.C. View
4537Unius Patent Attorneys Office View
4636HATTA & ASSOCIATES View
4734YASUTOMI & Associates View
4834KIYOHARA & CO.,PATENT ATTORNEYS View
4934HOSODA INTERNATIONAL PATENT OFFICE View
5032Iwatani Patent Office View
5131Isono International Patent Office, P. C. View
5231Miyoshi & Miyoshi View
5326SK Intellectual Property Law Firm View
5426LEXIA PARTNERS View
5526R&C IP Law Firm View
5626WINGREEN Patent Firm View
5724TOKYO ACTi International Patent and Trademark Office View
5824SHINSEI PATENT OFFICE View
5923TANI & ABE, p.c. View
6023SSINPAT PATENT FIRM 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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