By train
By train
JR Iwakuni Station is on the San'yo Main Line. It's about 45 minutes from Hiroshima by local train, and makes a nice onward stop after a night at Miyajima. It's also accessible via Shin-Iwakuni Station, on the San'yo Shinkansen, but only on the all-stops Kodama about 20 minutes.
By plane
By plane
The airfield is only available for use by the U.S. military. It's a cause of some controversy, as residents have clamored for it to be converted into a public international airport. At present, the closest public airports are in Hiroshima and Ube.
By bus
By bus
Buses run to Iwakuni from the Hiroshima Bus Center. Most overnight routes from Tokyo, Kyoto, and Osaka that are bound for Hagi will include a stop at Iwakuni.