Route Overview
Karisaka Road is a scenic mountain route that connects Chichibu City in Saitama Prefecture and Yamanashi City in Yamanashi Prefecture. It is part of National Route 140 and passes through Chichibu-Tama-Kai National Park. The highlight is the Karisaka Tunnel, one of Japan’s longest road tunnels (6.6 km), which runs under the historic Karisaka Pass, one of Japan’s “Three Great Passes.”
This approximately 17 km route offers winding mountain roads and dynamic natural scenery, making it popular among touring riders and drivers alike.
Recommended Driving Section
Michi-no-Eki Mitomi (Yamanashi) → Karisaka Tunnel → Michi-no-Eki Otaki Onsen (Saitama)
- Enjoy scenic valleys, thrilling curves, and the long tunnel experience.
- In autumn (mid-October to early November), the fall colors are stunning and attract many visitors.
Road Conditions & Safety Information
- Fully paved, though some parts are narrow with many curves.
- The tunnel is well-lit but long—always turn on your headlights.
- In winter, snow and ice are common. Winter tires or chains may be required.
- Watch out for wildlife and potential falling rocks.
Points of Interest
- Michi-no-Eki Mitomi: Local produce, snacks, and a good rest stop.
- Karisaka Ridge Trailhead: Access point for hikers and trekkers.
- Michi-no-Eki Otaki Onsen: Features a relaxing hot spring bath with outdoor views.
- Takizawa Dam: Impressive dam with observation spots.
Local Food
- On the Yamanashi side: Try Hōtō noodles and Shingen mochi sweets.
- On the Saitama side: Popular dishes include Waraji Katsudon and handmade soba noodles.
- Fresh fruits like grapes and peaches are available at roadside stations.
Fees & Access
- Karisaka Tunnel is a toll road:
– Regular car: ¥520
– Motorcycle: ¥370 (as of 2024) - From the Kan-Etsu Expressway (Hanazono IC), drive about 60 minutes via Route 140.
- From the Chūō Expressway (Katsunuma IC), it’s about 40 minutes.
Best Season & Climate
- Spring (April–June): Fresh green forests and mountain cherry blossoms.
- Autumn (October–November): Beautiful fall foliage.
- Summer: Cool and pleasant in the mountains.
- Winter (Dec–Mar): Snow and ice—drive with caution.
Sample Touring Plan
Day Trip from Tokyo Area
Chichibu → Otaki Onsen → Karisaka Tunnel → Mitomi → Katsunuma → Return
(Estimated time: 5–6 hours)