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

  • Technical field:  Pharmaceutical (pharmaceutical composition, medicine, API, production method of thereof, etc.)
  • Status:  Japanese granted patents in 2018 (registration date).
  • First country:  Japan (i.e., (i) patents with claiming priority of a Japanese application, (ii) patents based on Japanese domestic application, or (iii) patents based on PCT application whose receiving office is 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
185The Patent Corporate Body Aruga Patent Office View
277SAEGUSA & Partners View
360Takashima International Patent Office View
455Hiraki & Associates View
547SHIGA International Patent Office View
646Aoyama & Partners View
744SIKs & Co. View
841Iwatani Patent Office View
939Soei Patent & Law Firm View
1034YUASA AND HARA View
1129LEXIA PARTNERS View
1228TSUKUNI & ASSOCIATES View
1328Shimizu Patent Office View
1427Hirota, Nagare & Associates View
1522OHNO & PARTNERS View
1621IP Firm SHUWA View
1721SEIWA PATENT & LAW View
1820Shobayashi International Patent &Trademark Office View
1919HOSODA INTERNATIONAL PATENT OFFICE View
2017Sakai International Patent Office View
2117Abe, Ikubo & Katayama View
2215Hirota & Associates View
2315TMI Associates View
2415Nakamura & Partners View
2515Moegi Patent Office View
2614CENTCREST IP Attorneys View
2714Anderson Mori & Tomotsune View
2814TAIYO, NAKAJIMA & KATO View
2913YuNeed International Patent Office View
3013SHUSAKU・YAMAMOTO 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, Pharmaceutical 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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