"Osaka Rainy Blues" (大阪レイニーブルース,Ōsaka Reinī Burūsu?) is the second single released by the JapaneseboybandKanjani Eight. The single is the group's only single not to reach the top five on the Oricon and the poorest performing single sale wise. The single also marks the last official release that former member, Hiroki Uchi, participated in. The album version of the song had his vocal leads sung over by Ryo Nishikido.