Route Overview

This two-day cycling route connects the famous hot spring town of Kusatsu with Matsumoto, passing through mountain roads, onsen hamlets, and a short stretch of the old Nakasendo post town route. The ride includes a long climb over Japan's highest national road at 2,172 meters and a net altitude loss of around 500 m by the end. Spring riders will especially enjoy cycling between the towering snow walls on Mt. Shirane - a seasonal highlight.

This route is ideal for cyclists comfortable with climbing and looking for a blend of rural scenery, classic onsen experiences, and historical side stops.

Distance & Elevation

Day 1: Kusatsu to Aisome Onsen (approx. 70 km / 1,300 m gain)
Day 2: Aisome Onsen to Matsumoto (approx. 24 km / 300 m gain)

Highlights

• Ride through towering snow walls on the way up to Mt. Shirane
• 25 km descent from the pass into Tomi and valley towns
• Optional detour through the well-preserved Unno-juku, a Nakasendo post town
• Finish at Matsumoto Castle - one of Japan's most iconic keeps
• Mix of modern accommodations and rustic baths
• Potential overnight in a lesser-known hot spring town

Route Description

Kusatsu to Aisome Onsen (Day 1)

Leaving Kusatsu, the road climbs gradually through ski areas and coniferous forest. This is the start of Route 292, which crests at 2,172 meters, the highest paved national road in Japan. In early spring, this section becomes a snow corridor - the road carved between walls of snow several meters high.

The descent begins at the visitor center near Mt. Shirane, an active volcano. There are signs warning of possible volcanic gas in the area, but the route is frequently used by other cyclists and cars, and is considered safe when open.

From the summit, a 25 km descent leads down into the Tomi area, passing by open farmland and small towns. Though this section can have some car traffic, the road is wide and generally provides space for cyclists.

Rather than stop in Tomi proper, pushing an extra 20 km uphill leads to a small, quiet hot spring hamlet where lodging options include older inns with large public baths and scenic views. This adds a bit more effort but makes for a more memorable overnight stop.

Aisome Onsen to Matsumoto (Day 2)

The final stretch into Matsumoto is comparatively short - just 24 km - but includes a few climbs and narrow valley roads. After a long previous day, this is a welcome change of pace.

Not far from Tomi, the route skirts the edge of the Nakasendo, and a small detour leads through Unno-juku, a well-preserved post town with traditional architecture and a short walking street. It's a nice break point, even if just for a water refill.

The route continues along the river valley, gradually gaining elevation before dropping into Matsumoto city. There are several options for small side roads near the end to avoid traffic.

Upon arriving in Matsumoto, one final stop is highly recommended: the Matsumoto Castle, one of the best-preserved castles in Japan and a fitting end to a multi-day rural cycling route.