
Kanagawa
A colorful mix of experiences comes together at this hot spring theme park—swimming in pools, relaxing in natural hot springs, enjoying outdoor activities, savoring generous meals, and browsing for souvenirs. At "Yunessun", the swimwear-friendly hot spring area, visitors find not only a flowing pool but also unique baths such as the wine bath. "Mori no Yu", the authentic day-use onsen, offers scenic open-air baths and private bathing rooms, creating a serene setting for an unhurried hot spring retreat.
Day-trip hot springs that use natural spring water are especially popular among health-conscious individuals and hot spring enthusiasts. Some facilities have their own hot spring source and offer fresh spring water, while others focus on providing "flowing directly from the source" without circulating the water. Natural hot springs offer various benefits depending on the water type: chloride springs warm the body deeply, hydrogen carbonate springs smooth the skin, and sulfur springs have strong antibacterial properties. When choosing a hot spring facility, be sure to check the spring water quality and its benefits.
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箱根小涌園ユネッサン
A colorful mix of experiences comes together at this hot spring theme park—swimming in pools, relaxing in natural hot springs, enjoying outdoor activities, savoring generous meals, and browsing for souvenirs. At "Yunessun", the swimwear-friendly hot spring area, visitors find not only a flowing pool but also unique baths such as the wine bath. "Mori no Yu", the authentic day-use onsen, offers scenic open-air baths and private bathing rooms, creating a serene setting for an unhurried hot spring retreat.