The journey from Shin-Takaoka to Karuizawa is serviced primarily by the Hokuriku Shinkansen, specifically the Kagayaki and Hakutaka services. The fastest option, the Kagayaki, reaches speeds of up to 260 km/h (162 mph) and covers the distance in approximately 1 hour and 30 minutes, making limited stops at major stations such as Nagano and Toyama. The Hakutaka service, while slightly slower, taking around 2 hours, offers an opportunity to stop at more stations for those wanting to explore the region further.
Both train services provide comfortable seating options and amenities, including Wi-Fi and refreshments. The Kagayaki service is optimal for travelers prioritizing speed, whereas the Hakutaka offers a more extensive travel experience with additional stops. For those wishing for more spacious accommodations, Green Class seating is available on both trains, providing enhanced comfort during the journey.