The train service between Chikugo and Okayama is primarily operated by the Limited Express Nanpu and the local trains. The Limited Express Nanpu is the fastest option, reaching speeds of up to 120 km/h (75 mph), and it makes the journey in about 1 hour and 20 minutes. This service departs from Chikugo's main station and travels directly to Okayama, stopping at key stations like Kurume and Fukuyama. On the other hand, local trains take longer, around 2 hours, as they stop at several more stations along the way.
The Limited Express Nanpu offers a comfortable seating arrangement with standard and Green class options for passengers seeking additional comfort. Depending on the time of day, multiple departures are available, allowing flexibility in travel plans. The local trains, while slower, provide access to smaller towns and regional areas, making them suitable for travelers exploring the less urban parts of the journey.