The Onioshi Highway is a scenic toll road connecting Karuizawa with Tsumagoi, offering panoramic views of the surrounding mountains, including the active volcano Mount Asama. It's particularly renowned for its vibrant autumn colors and snow-covered landscapes in winter, making it a popular route for those seeking natural beauty and a pleasant drive.
Visitors consistently praise the highway for its stunning vistas and photo opportunities. Many highlight the beauty of the snow-capped mountains in winter, noting that it's a unique experience for those from warmer climates. The autumn foliage also receives high marks, transforming the drive into a colorful spectacle. Reviewers appreciate the rest area located halfway along the route, which provides facilities for a break, including a shop and a grassy area suitable for pets.
For the best experience, visitors recommend driving the highway, as it is designed for scenic motoring. It is advisable to bring warm clothing, especially during winter and spring, as it can be quite windy and cold at higher elevations. The drive itself can take anywhere from 30 minutes to an an hour, depending on how many stops are made for photos. Consider visiting during the late afternoon to catch a sunset over the mountains, as some reviewers have found this to be a particularly memorable experience.
The Onioshi Highway is best accessed by car. It connects the popular resort town of Karuizawa in Nagano Prefecture with Tsumagoi-mura in Gunma Prefecture. There is no direct public transport that traverses the entire highway, so renting a car is the most practical option for tourists. Parking is available at the rest stops along the route.
While generally well-regarded, some visitors note that the highway is a toll road, which might be an unexpected cost. Additionally, outside of peak seasons like autumn or winter, the views, while still pleasant, might not be as dramatic. To mitigate this, check seasonal conditions and weather forecasts before planning your trip to ensure the best possible scenic experience.
