Phymatopus japonicus

{{Short description|Species of moth}}

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| taxon = Phymatopus japonicus

| authority = Inoue, 1982{{cite journal |last1=Nielsen |first1=Ebbe S. |last2=Robinson |first2=Gaden S. |last3=Wagner |first3=David L. |year=2000 |title=Ghost-moths of the world: a global inventory and bibliography of the Exoporia (Mnesarchaeoidea and Hepialoidea) (Lepidoptera ) |journal=Journal of Natural History |volume=34 |issue=6 |pages=823–878 |doi=10.1080/002229300299282 |s2cid=86004391 |url=http://johngrehan.net/files/1013/8578/1218/Nielsen_et_al_2000_Hepialidae.pdf |access-date=2016-06-18 |archive-url=https://web.archive.org/web/20160311132727/http://johngrehan.net/files/1013/8578/1218/Nielsen_et_al_2000_Hepialidae.pdf |archive-date=2016-03-11 |url-status=dead }}

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Phymatopus japonicus is a species of moth belonging to the family Hepialidae. It was described by Hiroshi Inoue in 1982, and is known from Japan, from which its species epithet is derived. The food plant for this species is Pteridium.