Lake Shikaribetsu, Japan — Stargazing at Hokkaido's Highest Lake
Overview
Lake Shikaribetsu (然別湖) lies in Shintoku-cho, Kato-gun, Hokkaido — the highest-elevation natural lake in the prefecture at 810 m above sea level. Known affectionately as the "Sky Lake," it sits at the southern boundary of Daisetsuzan National Park, wrapped in old-growth forest and an almost total absence of human noise.
Observing Conditions
What makes Shikaribetsu exceptional is the near-complete lack of artificial light. The nearest town, Shintoku, is about 30 km away, leaving the sky here essentially unaffected by urban glow. The 810-metre altitude shaves a layer off the atmosphere, bringing starlight into slightly sharper focus.
On the right night, the Milky Way reflects in the surface of the lake — a sight that photographs can't fully capture. The sky here rates Bortle Class 1, a level of darkness that few places in Japan can match.
Best Seasons
July through September offers the most comfortable conditions — mild temperatures allow for extended sessions, and the Milky Way arches directly overhead. In winter, the "Shikaribetsu Lake Kotan" festival transforms the frozen lake into an outdoor venue where you can observe stars while standing on the ice. Temperatures can plunge below -20 °C, so serious cold-weather gear is essential for winter visits.
Access and Practical Info
About 45 minutes by car from the Memuro IC on the Doto Expressway. The lakeside hotel Shikaribestsuko Onsen Hotel Fusui offers accommodation — staying overnight means you can step outside at any hour and observe at your leisure.
Shikaribetsu Nature Center runs nighttime watching tours during summer, with guides explaining the constellations as you go. Ideal for those new to stargazing.
Observing Tips
The lake's north shore car park is particularly well-positioned for observation. Long-exposure photography using the lake's reflections is hugely popular here. One important note: this is bear country. Never go out alone at night, and carry a bear bell and a light at all times.
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