On the Saku to Karuizawa route, the primary service available is the Limited Express, specifically the Shinano train. This service operates at speeds of up to 120 km/h (75 mph) and typically, the journey takes approximately 40 minutes. The Shinano train offers comfortable seating and features both Standard and Green class options, catering to various traveler preferences. Additionally, the train makes fewer stops, enhancing the travel experience between these two destinations.
For travelers looking for scenic views, the Shinano Limited Express provides large windows and onboard amenities such as vending machines and restrooms, making the ride enjoyable. While there are no Shinkansen services directly connecting Saku and Karuizawa, the Limited Express efficiently serves those traveling between these points. Overall, the Shinano train strikes a good balance of speed and comfort, making it the preferred choice for this route.