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

  • Technical field:  IT (information technology, computer Software, computer program, method using software, etc.)
  • Status:  Japanese granted patents in 2019 (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
1428SHIGA International Patent Office View
2381ITOH International Patent Office View
3204Fukami Patent Office, P.C. View
4155Ohtsuka Patent Office View
5135TMI Associates View
6127Nakamura & Partners View
7126RYUKA IP LAW FIRM View
8115SHUSAKU・YAMAMOTO View
9107TANI & ABE, p.c. View
1094SEIWA PATENT & LAW View
1192YUASA AND HARA View
1291SUZUYE & SUZUYE Intellectual Property Law View
1388ONDA TECHNO Intl. Patent Attys View
1481Sonoda & Kobayashi View
1572SUGIMURA & Partners View
1671Sonderhoff & Einsel View
1762In-house patent attorney
1854Miyoshi & Miyoshi View
1950TAIYO, NAKAJIMA & KATO View
2049World IP Law View
2148Aoyama & Partners View
2244Kyosei International Patent Office View
2342M&S Partners View
2438Sakai International Patent Office View
2536SK Intellectual Property Law Firm View
2636Soei Patent & Law Firm View
2736LIL International Patent & Trademark Firm View
2836Asamura Patent Office, p.c. View
2934Yamakawa International Patent Office View
3033KAWAGUTI & PARTNERS View
3133TRY International IP LAW FIRM View
3232Takahashi Hayashi and Partner Patent Attorneys inc. View
3332Okabe International Patent Office View
3431PRIMEWORKS IP Attorneys View
3529In-house patent attorney
3628Hiraki & Associates View
3727SUWAZAKA Patent and Trademark Office View
3826Shinjyu GLOBAL IP View
3926SANSUI PATENT FIRM View
4026Hirota & Associates View
4126S. SOGA & CO. View
4224KYOWA PATENT AND LAW OFFICE View
4323DAIBAPATENT Kawamorita & Shionoya View
4422Yoshikawa International Patent Office View
4521WAKABAYASHI PATENT AGENCY View
4619Okuyama & Sasajima View
4719Tsubame Patent Attorney Firm View
4819Ashida & Kimura View
4919Shobayashi International Patent &Trademark Office View
5019Takaoka IP Law 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, IT 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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