eternal story Co., Ltd. (Nagano City, Nagano Prefecture; President Tatsuya Murakami), a group company of Goekai Co., Ltd. (Nagano City, Nagano Prefecture; President Soichiro Tokuyasu), will offer a unique summer-only hot spring experience called "Chilled Hot Spring" at Kotori no Yu (Matsushiro-machi, Nagano City, Nagano Prefecture), a day-trip hot spring facility it operates. The event will run for a limited period from July 3, 2026 (Fri) to July 26, 2026 (Sun). In recent years, extremely hot days have been increasing nationwide, making heatstroke prevention and summer lifestyle choices significant social issues. At the same time, many people feel that bathing in hot springs during summer is too burdensome, leading to decreased usage of hot spring facilities. To address this, Kotori no Yu has introduced the "Chilled Hot Spring" concept, offering a new way to enjoy hot springs comfortably even during intense summer heat. During the event period, guests can enjoy "three distinct bathing experiences" with different water temperatures: (1) Indoor Bath (Classic hot spring experience with water that warms the body from within) (2) Outdoor Bath (Naturally cool outdoor bath, available only in summer, using spring water at its natural temperature) (3) Scenic Outdoor Bath (Open-air bath with pleasant water temperature, offering relaxing views of the surrounding landscape) By offering baths at varying temperatures, guests can choose the bathing experience that best suits their physical condition and preferences on any given day. Enjoying the full benefits of hot spring minerals with "Chilled Hot Spring" "Chilled Hot Spring" is a unique summer experience that allows guests to comfortably cool down overheated bodies while still enjoying the soothing and relaxing qualities inherent to hot springs. Unlike air-conditioned rooms or swimming pools, the key feature of this experience is the ability to feel cool while soaking in mineral-rich hot spring water. The hot spring water at Ko