Okukurogane Matsushima Onsen Public Bathing Culture

A regional onsen network formed by multiple famous hot spring destinations concentrated in the Fuji volcanic belt (Hakone, Atami, Izu, etc.). Shared geological backgrounds ensure diverse mineral properties and geothermal resources. Historically independent Edo-period resorts, they formed an integrated tourism zone after Meiji-era transportation development, enabling both day-trip and overnight access from the Tokyo metropolitan area. Recently reorganized under 'Fuji-zone onsen resort' concepts.

One of Japan's highest hot springs at 1,800m altitude. Its rich milky sulfur waters and open-air baths under starry skies offer supreme experiences. Skiing available in winter.

Hot spring in Unzen, Nagasaki Prefecture, characterized by volcanically-rich sulfur waters. Developed strong foot bath culture as a therapeutic practice. Historically known since the Edo period as a site of Christian martyrdom, it functioned as a spiritual purification location. Sulfur's medicinal properties for skin conditions contributed to the Meiji period's development of scientifically-validated onsen therapy.

A small hot spring resort in Yamanouchi, Nagano Prefecture. Featuring approximately 80 traditional inns, it is known for its unique 'yumeguri' tradition where guests bathe in nine public bathhouses. Renowned for its old-fashioned charm and rustic atmosphere, it attracts many backpackers and younger tourists seeking an authentic onsen experience.

A collection of hot spring resorts on the Noto Peninsula, Ishikawa Prefecture, including Wakaura Onsen and Wajima Onsen. Featuring open-air baths with views of the Japan Sea, tourism increasingly combines hot spring bathing with agricultural experiences and home-stay culture. Attracting approximately 500,000 visitors annually, it functions as an important regional tourism industry.

Located at the northernmost point of the Okuhida region, featuring multiple spring sources in the upper Kameda River. Known for its effervescent carbonated waters. Serves as an access point for the Shinhotaka Ropeway, drawing many climbers. Despite its remote mountain location, it offers several inns and rotenburo facilities, balancing the appeal of a hidden spring with practical amenities.

A hot spring in Mimasaka, Okayama, discovered in the late Edo period. Its soft, alkaline-simple waters are gentle on the skin. Historically visited by young Hideyo Noguchi for hydrotherapy, it is known as 'beauty water.' The tradition of shared public baths continues, preserving the intimate mingling of locals and tourists characteristic of authentic onsen towns.