Shiman, Nakanojo Town, Agatsuma District, Gunma Prefecture
Rating
Cost per person
¥1,500
Lake Okushiman, completed in July 1999, is known for its stunning "Shima Blue" waters, which change color depending on the season and weather. Located near Shima Onsen in Gunma Prefecture, the lake is accessible by a 40-minute bus ride from Nakanojo Station followed by a 60-minute walk. Visitors can also explore the nearby dam museum and cafe. The best time to visit is from April to May on a sunny morning to witness the most vibrant blue. A drive around the 4km perimeter road offers several scenic viewpoints, but be aware of potential bear sightings if walking.
Size: Area: 32