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The 1964-founded Kanazawa Bathhouse in Higashi-Shinjuku has been transformed into Koganeyu Shinjuku, blending more than 50 years of history with contemporary design and amenities. The revamped sento preserves its iconic bathhouse mosaic while introducing a cave-inspired sauna with a lava stone sauna room, a carbonated microbubble cold bath, an open-air relaxation area, a craft beer bar with five house-brewed beers and a DJ booth.