The travel route from Kumamoto to Tosu is primarily serviced by the limited express trains, specifically the Kyushu Sonic and the Kamome trains. The Kyushu Sonic can reach speeds of up to 130 km/h (81 mph) and takes approximately 1 hour and 10 minutes to complete the journey with minimal stops, making it a popular choice for travelers seeking a faster option. On the other hand, the Kamome train, while also a limited express, operates at a slightly lower speed, averaging around 110 km/h (68 mph), and takes about 1 hour and 30 minutes for the same trip, stopping at several regional stations along the way.
Both train services provide comfortable seating and onboard facilities, with options for both standard and reserved seating. The Kyushu Sonic is suited for those prioritizing speed, while the Kamome offers a chance to see some of the countryside with its additional stops. Overall, both services offer reliable and efficient travel between Kumamoto and Tosu.