Traveling from Higashine to Nan'yō is primarily serviced by the Yamabiko and the Kumamoto services. The Yamabiko train operates on the Yamagata Line and features different seating classes, providing a comfortable experience for passengers. It has an average speed of 110 km/h (68 mph), and depending on the specific route taken, the journey can take approximately 40 minutes to 1 hour.
On the other hand, the Kumamoto service offers a slightly longer travel time of around 1 hour and 10 minutes, with its operational speed also hovering around 110 km/h (68 mph).
Both trains feature basic amenities, including restrooms and some onboard refreshments, making them suitable for short to medium-distance travel. The Yamabiko is generally preferred for its quicker travel time. For a more relaxed experience, passengers can choose the extra space offered by certain higher-class seating options.