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

  • Technical field:  Diagnosis of disease (diagnosis agent/method, detecting agent/method of cancer/dementia, 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
132SHUSAKU・YAMAMOTO View
231Shimizu Patent Office View
329Hiraki & Associates View
415SHIGA International Patent Office View
515Aoyama & Partners View
613YUASA AND HARA View
713SAEGUSA & Partners View
813Soei Patent & Law Firm View
912YuNeed International Patent Office View
1010Sonoda & Kobayashi View
119Abe, Ikubo & Katayama View
129SEIWA PATENT & LAW View
138Takaoka IP Law View
148OHNO & PARTNERS View
158KAWAGUTI & PARTNERS 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, diagnosis).
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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