If you are outside of Japan and considering requesting the service of a patent attorney in Japan, Japan Patent Attorney Search provides publicly-available information helpful for selecting a patent attorney to consult.
Please do not use this service for other purposes.
・The Japan Patent Attorney Search includes information only from patent attorneys and firms willing to
make their information available on this search service to users outside Japan (not all information about
patent attorneys and firms is searchable).
・Publicly-available information is information that association members have taken it upon themselves to
disclose, except for Japan Patent Attorneys Association’s registration number, registration date and Japan
Patent Office Information on Fields Handled by Patent Attorneys. The Japan Patent Attorneys Association
assumes no responsibility for such information.
・Because of the prohibition on undertaking cases in conflict of interest with already undertaken cases,
patent attorneys and firms may not be able to accept requests in some instances.
【※】Japan Patent Office Information on Fields Handled by Patent Attorneys
This is information held and provided for the public by the Japan Patent Office.
The name of a patent attorney listed as an agent on an application in 2018 is counted as one per application, and the top five classifications are shown by classification number for patents and utility models, designs, and trademarks.
For patents and utility models, designs and trademarks, those with the highest total number of application listed are shown in the upper part, and classifications having highest number of application listed in each division are shown on the left side.
In cases where the top five in a division all have the same number and there are five or more items, all of the classifications are shown, and, conversely, there may also be cases where there are four or fewer (there is no relationship between the number of classifications shown and the amount of applications handled).
If there are no applications on which a patent attorney’s name is listed as an agent, the space is left blank.
A detailed description of the classifications may be found here (link to WIPO website)