The route from Karuizawa to Komatsu is served primarily by the Limited Express trains, notably the Hokuriku Shinkansen and the Thunderbird Limited Express. The Hokuriku Shinkansen offers a comfortable journey with speeds reaching up to 260 km/h (162 mph), covering the distance in approximately 2 hours. This service provides direct access to the picturesque city of Komatsu, known for its UNESCO World Heritage Sites.
In contrast, the Thunderbird Limited Express takes a slightly different route and makes more stops, resulting in a longer travel time of about 3 hours. It operates at speeds of 120 km/h (75 mph) to 140 km/h (87 mph), connecting various locations along the way.
Both trains feature Ordinary and Green class seating options, catering to different passenger preferences. The Hokuriku Shinkansen is favored for its speed, making it ideal for those prioritizing a quick journey, while the Thunderbird provides a more scenic experience with additional stops at notable sites.