Lake Shikotsu

Lake Shikotsu, cradled in a volcanic caldera southwest of Sapporo, is one of the clearest lakes in Japan and one of Hokkaido's most beautiful natural landscapes. Formed by a colossal eruption tens of thousands of years ago, it is a deep, cobalt-blue caldera lake, the second deepest in the country, ringed by conical volcanoes: Mount Eniwa to the north and the twin peaks of Mount Fuppushi and Mount Tarumae to the south. Because it is so deep, the lake never freezes over even in Hokkaido's fierce winters, earning it the nickname of Japan's northernmost ice-free lake.

The water quality is the lake's signature. Fed largely by underground springs and holding almost no suspended sediment, Shikotsu has repeatedly topped national rankings for water clarity, and on a calm day the surface is so transparent that boats seem to float on air above the submerged rocks and logs. The best way to appreciate this is from the water itself: at the main lakeside village of Shikotsuko Onsen you can rent rowboats, pedal boats, and canoes, or take a sightseeing cruise, including clear-bottomed boats that reveal the depths below. Kayaking and stand-up paddleboarding have become popular ways to explore the quiet shoreline and hidden coves.

The surrounding Shikotsu-Toya National Park offers hiking to match the scenery. The volcanoes ringing the lake are all climbable, with Mount Tarumae, an active volcano with a smoking lava dome, being a relatively short and hugely rewarding hike that ends in sweeping views over the caldera. Gentler walks follow the lakeshore and the crystalline rivers that drain the lake, and the whole area blazes with colour in autumn as the forests turn. Shikotsuko Onsen village provides hot-spring baths, ryokan, a visitor centre, restrooms, and places to eat, making a comfortable base.

Winter brings one of the area's signature events, the Shikotsuko Ice Festival, held from late January into February, when sculptors spray lake water over frames to build glittering blue ice structures, tunnels, and figures that glow with coloured light after dark. The festival draws visitors from across Hokkaido and turns the lakeside into a frozen wonderland. Spring and early summer are quieter, with fresh green and mild weather ideal for boating, while autumn combines crisp air with brilliant foliage.

Lake Shikotsu is easy to reach and makes an excellent day trip from Sapporo or a stop on the way to or from New Chitose Airport, from which buses reach Shikotsuko Onsen in under an hour; buses also run from Chitose and, seasonally, from Sapporo. A car offers the most freedom to circle the lake and reach the trailheads. The lakeside is free to enjoy, with charges only for boat rentals and cruises. Whether you come to paddle across impossibly clear water in summer, hike a smoking volcano, admire autumn colour, or wander among glowing ice sculptures in the depths of winter, Lake Shikotsu rewards a visit in every season, and ranks among the finest natural escapes within easy reach of Sapporo.