Osaka (lafazi : /osaka/) Birni ne, da ke a kasar Japanise. Osaka yana da yawan jama'a 19,341,976 bisa ga jimillar shekara ta 2012. An gina birnin Osaka kafin karni na biyar kafin haifuwan annabi Isah. Shugaban birnin Osaka shine Hirofumi Yoshimura. Ōsaka, birni da babban birnin Ōsaka fu (babban birni), kudu maso tsakiyar Honshu, Japanis. Garin, tare da makwabtan garin Kōbe da Kyōto na kusa, su ne cibiyoyin Keihanshin Yankin Masana'antu, birni na biyu mafi girma a cikin birni da haɓaka masana'antu a Japan. Ōsaka yana gefen Tekun Ōsaka a ƙarshen gabashin Tekun Inland, a gaɓar Kogin Yodo. Yankin babban birninta ya bazu akan tsaunuka kuma zuwa cikin tsaunukan ruwa na Yodo, Yamato, da sauran koguna. Kōbe tana gefen arewa maso yammacin gabar Ōsaka Bay, kimanin mil 20 (kilomita 30) yamma da Ōsaka. Yanayin yana da yanayi mai kyau, tare da sanyin hunturu da lokacin zafi, rani mai zafi; ruwan sama na shekara-shekara kusan inci 54 ne (1,360 mm). Yankin yana cikin mahaukaciyar guguwa a watan Satumba, wanda wani lokaci yakan zama bala'i.