The Okayama to Sanyo-Onoda route is primarily served by the local and rapid trains of the Sanyo Line. The most notable service is the Rapid Service, which runs periodically and offers a comfortable ride for passengers. These trains typically operate at speeds of around 120 km/h (75 mph), making the journey take approximately 1 hour and 10 minutes, depending on the specific service and time of day. The local trains, on the other hand, take a longer time, averaging about 1 hour and 30 minutes, as they make more stops along the way. Both train types have basic amenities, allowing passengers to enjoy a smooth ride through the scenic countryside of western Japan. While there are no high-speed Shinkansen services directly between Okayama and Sanyo-Onoda, the existing rapid services provide a reliable option for travelers looking to explore this region.