Musashi-Koyama Onsen Shimizu-yu | Tokyo

About This Activity

Musashi-Koyama Onsen Shimizu-yu is a hidden gem in Tokyo's Shinagawa Ward. It offers visitors the rare opportunity to bathe in two distinct types of natural hot spring waters. Conveniently located near Musashi-Koyama Station, this traditional onsen delivers a peaceful and authentic Japanese bathing experience, perfect for those seeking relaxation away from the city's fast pace.

What sets Shimizu-yu apart is its access to two natural springs drawn from 1,500 meters underground. The first is the kogane-yu (golden water), a rich iodine-infused spring certified as a medical treatment spring. This amber-colored water is believed to improve circulation, relieve fatigue, and promote overall wellness. The second spring, kuroyu (black water), is known for its smooth texture and skin-beautifying properties, making it especially popular among regular bathers and skincare enthusiasts.

Guests can enjoy these healing waters in open-air baths (rotenburo), adding a touch of tranquillity under the sky to the therapeutic experience. Though traditional, Shimizu-yu is clean and welcoming, with an onsite information counter. The facility accepts cash payments only, so visitors should come prepared.

Whether you're a first-time onsen visitor or a seasoned spa lover, Shimizu-yu provides a calming, cultural experience that refreshes body and mind. The combination of therapeutic waters, modest pricing, and a locally friendly atmosphere makes it a must-visit for those exploring Tokyo's more authentic wellness spots.

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