Galloisiana yuasai is a species of insect in the family Grylloblattidae that is endemic to Japan. Its type locality is Tokugo Pass, Japan.[1]
Galloisiana yuasai is found in montane habitats in central Honshu, including in the southern Hida Mountains where it is sympatric with the morphologically larger Galloisiana kiyosawai.[2] It can be found alongside rocky stream banks.[1]