Volutharpa nipponkaiensis
Volutharpa nipponkaiensis is a species of sea snail, a marine gastropod mollusk in the family Buccinidae, the true whelks.
;Subspecies:Volutharpa nipponkaiensis lymnaeformis Habe & Ki. Ito, 1980Volutharpa nipponkaiensis nipponkaiensis Habe & Ki. Ito, 1980