On the Kurume to Izumi route, travelers can take advantage of the Limited Express train services, specifically the Sonic and the Minami-Sugata trains. The Sonic Limited Express operates at speeds of up to 120 km/h (75 mph) and covers the distance in approximately 2 hours, making a few strategic stops at key locations such as Tosu and Oita. The Minami-Sugata Limited Express, while slightly slower, at around 110 km/h (68 mph), offers a slightly longer travel time of around 2 hours and 30 minutes, with more stops along the way.
Both trains provide comfortable seating and air conditioning, ensuring a pleasant journey. The Sonic is recommended for those looking to minimize travel time, whereas the Minami-Sugata might suit passengers interested in a more scenic route with additional station stops.