Abstract
In this paper, the author deals with the review on the east asiatic millipede belonging to Riukiaria-Rhysolus-Rhysodesmus group. Several authorshave already commented that was next to impossible to make exact distinctions between Rhysodesmus and Riukiaria. The author discussed the generic status of Riukiaria in this paper. Then, all of east asiatic millipeds of this group, so called “Rhysodesmus”, are not classified to real Rhysodesmus, but most of them are belonging to the category of genus Riukiaria.