Hoshino Resorts Oirase Keiryu Hotel is holding a "Winter Scenic Private Outdoor Hot Spring" event (January 1 – February 26, 2025, Tuesdays and Wednesdays only), enabling exclusive use of the Yaejukono-yu (八重九重の湯) outdoor hot spring annexe at Oirase Keiryu — enjoying warm springs while viewing the pristine snow-covered scenery of Oirase Mountain Stream. Details: 15:30-17:30; 16,500 yen; 1 team per day (2 persons maximum). Hoshino Resorts, originally founded as a ryokan in Karuizawa, Nagano in 1914, is now in its 4th generation under Yoshiharu Hoshino and has grown into an influential hotel management company with 70+ properties across Japan and internationally, operating five distinct brands: HOSHINOYA (luxury), KAI (onsen ryokan), RISONARE (stylish resort), OMO (urban tourism hotel), and BEB (relaxed hotel for younger generations).