Onomichi City is located in Western Japan in Hiroshima Prefecture, on Japan's inland sea. It is about 75 minutes West of Osaka City by shinkansen (bullet train) and about 70 km East of Hiroshima City. The closest cities to it are Fukuyama City (about 12km to the East) and Mihara City (about 15km to the West). It is linked to Imabari City in Ehime Prefecture to the South on the island of Shikoku (Japan's fourth largest island by six islands and seven bridges which is known as the "Shimanami Kaidou" route.