Guide
Nishiyama Onsen is a prestigious hot spring area located in Hayakawa Town, Minamikoma District, Yamanashi Prefecture, boasting an illustrious history of approximately 1,300 years. The most significant feature of this destination is the ability to enjoy 100% natural, free-flowing (kakenagashi) hot spring water while immersed in a lush, natural environment. Facilities such as "Yushima no Yu" offer an unparalleled sense of openness, allowing guests to gaze at the surrounding mountains and the exquisite beauty of the valley from expansive open-air baths. It is an ideal setting to escape the hustle and bustle of daily life and deeply relax both mind and body.
Local legends tell that this hot spring was discovered roughly 1,300 years ago by Shiro Nagamaro and Shiro Hisamaro, the sons of Fujiwara no Makoto. Since ancient times, it has been celebrated as a renowned mountain hot spring and has been cherished by many seeking traditional healing through water (toji). The architecture and facilities, which harmonize beautifully with the natural landscape, serve as precious gateways to experiencing traditional Japanese hot spring culture.
The greatest charms of Nishiyama Onsen are its scenic views and the quality of its spring water. For instance, at "Yushima no Yu," you can enjoy an open-air bath in a space where wood, stone, and modern pergola designs blend seamlessly, providing a profound sense of freedom. At the luxury inn "Keiunkan," guests can experience the beauty of the Hayakawa Valley through five senses across six different types of baths. The combination of the changing seasons and the warm, free-flowing spring water provides a deep sense of tranquility to every visitor.
Nishiyama Onsen offers a different face to every season. In summer, visitors can enjoy river activities and hiking, while autumn brings a spectacular display of vibrant foliage. The autumn season is particularly popular, as the trees along the valley turn brilliant colors, creating a stunning backdrop for your soak in the hot springs. Additionally, during July and August, some day-trip bathing services extend their hours until 19:00, allowing you to enjoy the cool evening air.
Beyond the hot springs, there are plenty of ways to enjoy the surrounding nature. The driving route along the Hayakawa Valley is a scenic way to experience the changing seasons directly. For nature enthusiasts, the area offers birdwatching at the nearby Bird Park and geological interest through the Itoigawa-Shizuoka Tectonic Line. Some local inns also provide shuttle services for hikers, making it easy to combine an outdoor adventure with a relaxing soak.
Near Nishiyama Onsen lies Narita Onsen, another hidden gem known as a