The Aioi to Iwakuni route is primarily serviced by the Kodama Shinkansen, known for maintaining a moderate speed while providing local connectivity. This train travels at speeds of up to 240 km/h (149 mph) and makes several stops along the way, leading to a journey time of approximately 30 minutes. The route is quite scenic, passing through various landscapes unique to the Yamaguchi Prefecture.
Additionally, the local train service, called the San'yō Main Line, also covers this route, but it is significantly slower, taking around 1 hour with more frequent stops. The Kodama Shinkansen offers comfortable seating options and onboard services, making it the preferred choice for those valuing efficiency and comfort.