Lake Mashu First Observatory
Gaze upon the mystical “Mashu Blue” beneath the stars
Experience a 360-degree sky filled with stars at this breathtaking viewpoint. From the deep silence of night to the vivid blue waters below, the mystery of Lake Mashu comes alive here.
Located along Prefectural Road 52 on the caldera rim, the Lake Mashu First Observatory is a popular viewpoint known as “Omote Mashu.” Renovated and reopened in summer 2022 as the Lake Mashu Kamuy Terrace, it was designed to deepen visitors’ connection with nature. From the three-tier rooftop deck, you can overlook one of the world’s clearest lakes. Glass railings ensure unobstructed views; on calm days the lake mirrors the sky, while mist transforms the landscape into a dreamlike world of silver and white.
The rooftop terrace is also open at night, revealing countless stars in a sky free from city lights. Gazing at the Milky Way in the crisp mountain air is an unforgettable experience. Inside, the Lake Mashu Lounge features large windows overlooking the changing seasons. Visitors can enjoy local specialties such as imo-dango (potato dumplings) and mint-flavored soft serve inspired by the lake’s iconic blue. Every visit offers a new way to experience the ever-changing beauty of nature.
- * Please note that the text shown on this page includes machine translations.
- Nearest airports
General Information
- Postal code
- 〒088-3200
- Address
- 北海道川上郡弟子屈町摩周湖第一展望台
- Telephone Number
- 015-482-1530（Lake Mashu Kamuy Terrace）
- Open
- 8:30-17:00
- Closed
- Year-end and New Year holidays
- Car Park
- 125 spaces, charged (free from November to April)
- Directions
- ●By car: About 20 minutes from JR Kawayu Onsen Station
●By car: About 80 minutes from Memanbetsu Airport - Website
* Information on facilities is subject to change. Please check each official website for the latest information.
