
Hiroshima-ken (Hiroshima prefecture) is in the western Chugoku region of the main Japanese island Honshu. Hiroshima Airport (IATA: HIJ) fields a fairly good selection of domestic flights as well as some from Seoul, Bangkok and various points in China. Flight time from Tokyo, the busiest route, is around 90 minutes.
The Sanyo Shinkansen from Osaka to Fukuoka (Hakata) runs down the coast of Hiroshima prefecture, stopping at all major cities including Hiroshima and Onomichi. Direct Nozomi trains from Tokyo take about four hours to reach Hiroshima and cost ¥18,500 one-way.
Hiroshima is a major station on the JR West [6] San'yo Shinkansen line. It is roughly 40 minutes from Okayama (¥5350) and 90 minutes from Shin-Osaka (¥9440). Tokyo is four hours away via Nozomi (¥17,540) and five hours via Hikari.
Traveling overnight by train from Tokyo, you can take the 10PM Sunrise Izumo/Sunrise Seto train to Okayama, then take an early Shinkansen to Hiroshima, arriving around 7:45AM. Regular train services run through Hiroshima on the San'yo Main Line, along with several local lines.