The route from Tomakomai to Shiraoi is primarily serviced by the Limited Express train known as the 'Otaru'. This service typically operates several times a day and offers a journey that takes around 20 minutes, cruising at speeds up to 70 km/h (43 mph). The train provides a comfortable ride with standard seating options, making it a popular choice for both daily commuters and tourists exploring Hokkaido.
Unlike the high-speed services available in other regions of Japan, this route does not feature Shinkansen trains due to its relatively short distance. However, the Limited Express 'Otaru' offers direct travel between these two cities without the need for transfers, making it a practical option for travelers. For those looking for a slight upgrade, the train usually has more spacious seating available in selected carriages.