Guide
Hirugami Onsen is a charming hot spring resort located in Achi Village, Shimoina District, Nagano Prefecture. The area is famous for the discovery of its hot springs during tunnel construction for the former JNR Nakatsugawa Line. Today, it has developed into one of the largest hot spring towns in southern Nagano, featuring a wide variety of accommodation facilities. The most distinctive feature is the natural spring water, which boasts a high alkalinity with a pH level exceeding 9. This high-quality water offers a truly luxurious bathing experience amidst a beautiful natural setting.
The modern history of Hirugami Onsen began in 1973, when hot springs were struck during tunnel excavation for the Nakatsugawa Line. However, legends of hot springs in this area go much further back; historical documents such as 'Yuya Gongen' (1711) and 'Shinshu Ina-gun Mankan' (1740) contain descriptions of thermal waters. While the region was once known for tobacco cultivation, the discovery of the springs and the improved accessibility provided by the Chuo Expressway transformed it into a thriving hot spring destination. The area also holds deep cultural roots, being near the historic Achi Shrine, where the deity of wisdom, 'Omoikane-no-mikoto,' is enshrined.
Visitors to Hirugami Onsen can enjoy various facilities that utilize the local spring water and engage with the local culture. There is a public heated pool that uses the natural hot spring water, allowing you to experience the mineral composition even while swimming. In the heart of the hot spring town, you will find the 'Asaichi Hiroba' (Morning Market Square), a vibrant spot where local specialties are sold. Here, you can find fresh vegetables harvested in Achi Village, as well as konnyaku and traditional pickles. You may even encounter products related to the traditional insect-based food culture that has historically been practiced in southern Nagano, offering a unique glimpse into the local culinary heritage.
While Hirugami Onsen is beautiful year-round, the spring season (March to May) and the autumn season (September to November) are particularly highly recommended. During these seasonal transitions, you can enjoy the hot springs alongside the changing colors of the surrounding nature. The Asaichi Hiroba begins operating around 6:00 AM, so arriving early allows you to experience the lively atmosphere while picking up fresh local ingredients. For those looking to wash away the day's fatigue, we recommend visiting the hot spring facilities during the quiet early morning hours or the relaxing evening hours.
Beyond just soaking in the water, you can experience the local culture and nature through various activities. This includes exercising in the heated pool using the spring water, relaxing in foot baths, or searching for local delicacies at the morning market. At the Asaichi Hiroba, you can feel the rhythm of local life by handling traditional ingredients and fresh vegetables. Additionally, exploring the surrounding natural landscapes on foot is a wonderful way to complement your relaxation in the hot springs.
The area surrounding Hirugami Onsen is filled with the rich natural beauty of Achi Village. The location is highly convenient for travelers, with easy access via the Chuo Expressway interchanges. Nearby, you can also explore historical sites like Achi Shrine, allowing you to create a travel itinerary that combines relaxation with a journey through local history. The peaceful scenery of the surrounding mountains provides a perfect backdrop for a slow-paced, rejuvenating getaway.
To ensure a comfortable stay, please note the following information: