The route from Onomichi to Shinagawa is mainly serviced by the Shinkansen train, featuring both the Kodama and Hikari services. The Hikari Shinkansen operates at speeds of up to 285 km/h (177 mph), completing the journey in approximately 4 hours and 30 minutes with fewer stops compared to its counterpart. The Kodama service, while also a Shinkansen, travels at a lower speed of around 240 km/h (149 mph) and takes roughly 5 hours due to additional stops at various stations along the way, such as Fukuyama and Okayama.
Both train types offer Ordinary and Green class seating (Economy and First), ensuring that passengers have options for comfort throughout their travel. Onboard, passengers can enjoy amenities such as spacious seating and a selection of refreshments. The Hikari is suited for travelers prioritizing speed, while the Kodama is a good choice for those who prefer to visit more locations along the route.