For travelers journeying from Shimonoseki to Tosu, the primary option is the Limited Express train service, specifically the Sonic and the Kamome. The Sonic Limited Express operates at speeds reaching up to 130 km/h (81 mph) and typically completes the trip in approximately 2 hours and 30 minutes. This service features comfortable seating and ample luggage space, making it suitable for both short and long-distance travelers. On the other hand, the Kamome train also offers a similar journey duration, but it may have a few more stops along the way, slightly increasing the travel time to around 3 hours.
Both services provide amenities such as onboard food and beverage options and a mix of standard and reserved seating. While the Sonic is the faster choice, the Kamome allows access to additional stations, catering to those who may want to explore regional areas. Therefore, the choice between these two services largely depends on whether the traveler prioritizes speed or a broader travel experience.