HOSHINOYA Karuizawa Offers "Karuizawa Warming Solo Retreat," a Winter Hot Spring Program for Solo Guests
From December 1, 2026 to February 22, 2027, HOSHINOYA Karuizawa in Nagano Prefecture offers the "Karuizawa Warming Solo Retreat," a 2-night, 3-day program for one guest per group that combines two hot spring baths, acupuncture and moxibustion body care, a spa oil treatment, and warming meals.