Shima Lake: A Cobalt Jewel in Gunma

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Discover Shima Lake's mesmerizing cobalt blue waters in Gunma, a haven for nature lovers and tranquil escapes amidst stunning scenery.

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Shima Lake

Nestled in the Agatsuma District of Gunma Prefecture, Shima Lake is an artificial lake renowned for its mesmerizing cobalt blue waters, known locally as 'Shima Blue'. Surrounded by lush forests and mountains, it offers a tranquil escape and stunning natural beauty, especially vivid in spring and autumn.

A brief summary to Shima Lake

Shima, Nakanojo, Shima, Agatsuma District, Gunma, JP

Local tips

Visit during the early morning to experience the lake's calmness and stunning reflections.
Bring a picnic to enjoy by the lakeside, surrounded by nature's beauty.
Don't forget your camera; the views are especially breathtaking at sunset.
Check local weather conditions before your visit for the best outdoor experience.

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Getting There

Public Transport

From Nakanojo Station, take a bus bound for Shima Onsen. The bus ride takes approximately 15 minutes to Lake Shima. The one-way fare is around ¥450.
Car

From Shibukawa-Ikaho IC of Kan-Etsu Expressway, it's about 45 minutes to Lake Shima. There is free parking available near the lake. Be aware of the presence of wild animals such as monkeys and bears in the area.

Discover more about Shima Lake

Shima Lake, an artificial lake created by the Nakanojo Dam, is a jewel of Gunma Prefecture, famed for its captivating 'Shima Blue' waters. The striking blue hue, most intense during spring due to snowmelt, results from the transparency of the Shima River and the scattering of light by allophane particles in the water. The surrounding landscape provides a stunning backdrop, with vibrant greenery in spring and summer and fiery foliage in autumn. Visitors can explore the lake through various activities. Canoe tours are popular, offering a unique perspective of the lake's beauty and the surrounding forests. Hiking trails around the lake provide opportunities to spot local wildlife, including monkeys, boars, and tanuki (Japanese raccoon dogs). The Shima Ohashi bridge offers a panoramic view of the dam and the lake's clear waters, which can appear blue, turquoise, or dark blue depending on the weather and time of day. Located 8 kilometers from Shima Onsen, one of Gunma's most famous hot spring resorts, Shima Lake is easily accessible and offers a refreshing contrast to the onsen experience. The lake's serene atmosphere and picturesque scenery make it a must-visit destination for nature lovers and those seeking tranquility.