Iriga 【入賀】2 The Japanese surnames etymology dictionary.
① Topography . From the Kamonosen gate of the gate division system that was in the Edo era. An example of the location of the gate. Kagoshima-ken Hioki-shi Iimu-cho Iimureu, Kagoshima-ken Hioki-shi Iju-in town Kuwabata, Kagoshima-ken Kimotsuki-gun Kimotsuki-chou Kishi, Kagoshima-ken Kimotsuki-gun Kimotsuki-chou Maeda. Kagoshima-ken Minamikyuushuu-shi Kawabe-cho Ono, Kagoshima-ken Kanoya-shi Kochi -no- ya residence at Arisato Kushiro Town. The name of the gate and the name of the mansion are from the upper garden.