Autumn 2025 Mt. Io Light-Up & Kawayu Marche In 2025, the autumn event returns to Kawayu Onsen. From Saturday, October 4 to Saturday, November 29, the Atosanupuri (Mt. Io) Light-Up will run, and on Saturday, October 18 the Kawayu Marche—featuring many local vendors—and the Onsen River Night Walk Tour, a nighttime walk along the hot-spring river, are scheduled. Please take this chance to visit Kawayu Onsen in autumn. Atosanupuri (Mt. Io) Light-Up This popular autumn event lights the plumes rising from the mountainside, creating a magical nocturnal landscape. ● Period: 20 days in total, mainly on weekends, between October 4 (Sat) and November 29 (Sat) ● Time: 16:30–19:00 (On event days, the Sulfur Mountain MOKMOK Base will extend business hours until 18:00) ● Free to view ● On some days, a complimentary shuttle taxi will run from four lodging facilities in the Kawayu Onsen area! (Seats for 9 people / reservation required by 16:00 on the day / limited to operating days) *Please check the event calendar for the exact light-up dates and shuttle taxi operation days and times.* *This event is conducted with environmental consideration; dates and times are set in advance and environmental surveys are carried out.* Kawayu Marche A gathering of delicious local foods! Stalls line the hot-spring town, and the lively Kawayu-bayashi drumming will be performed. ● Date and time: Saturday, October 18, 12:00–19:00 Postponed to the following day in case of severe weather ● Location: Kawayu Onsen (next to KKR Kawayu) Onsen River Night Walk Tour The hot-spring river that flows through the town, the Onsen River, rises in steam and carries warm spring water—a miraculous scene. Join a guided night walk along the river to hear explanations and discover its mysteries. The tour covers a short distance at a leisurely pace, so anyone can join. ● Date and time: Saturday, October 18, 17:00–17:45 ● Meeting: 16:45 at the parking lot of Kinki-yu Bettei Suikazura ryokan ● Reservation required by the day before at 070-8985-2599 ● Capacity: 15 people ● Free participation https://www.masyuko.or.jp/news/2025_kawayu_autumn/