For the route from Honjo to Karuizawa, travelers can enjoy the services of the Limited Express Azusa and the Limited Express Super Azusa trains. The Super Azusa is the faster option, reaching speeds of up to 130 km/h (81 mph) and taking approximately 1 hour and 40 minutes to cover the distance, making limited stops at key stations along the way such as Matsumoto and Ueda. In contrast, the regular Azusa service operates slightly slower, taking about 2 hours and making more frequent stops, ensuring access to nearby towns and attractions.
Both trains feature comfortable seating arrangements in standard class and a more premium Green class option, allowing passengers to choose according to their preferences. Onboard amenities include spacious seats and the availability of refreshments, providing a pleasant journey experience. The Super Azusa is ideal for those prioritizing speed, while the Azusa is well-suited for travelers wishing to explore the region.