https://www.epo.org/en/searching-for-patents/helpful-resources/asian/japan/search
Searching in databases - Japan
Number search and document retrieval
Searching PAJ English abstracts on the JPO's J-PlatPat
Legal status information
Finding information on annual fee payment on the JPO's J-PlatPat
Retrieving detailed legal status information in Japanese from the JPO's J-PlatPat
Electronic file inspection on the JPO's J-PlatPat
Finding cited documents on the JPO's J-PlatPat
Finding Japanese patent term extensions on the JPO's J-PlatPat