Japan Patent Office started new fee reduction system from April 1, 2019.
The scope of reduction has been expanded and the procedure has been simplified.
The New fee reduction system is useful for small & medium enterprises and university applicants, etc.
Please see the following JPO's website for details.
https://www.jpo.go.jp/system/process/tesuryo/genmen/genmen20190401/document/index/leaflet_e.pdf - JPO's Schedule of fees