【Regenerative Tourism】From Sus... Marukoma Onsen Ryokan GSTC-05 Marukoma Onsen Ryokan: Leading the ... 2025.04.15e-SDGs, GSTC, Hokkaido Onsen, Japanese Onsen, Jozankei Onsen, Lake Shikotsu Onsen, Lake Toya Onsen, Niseko Onsen, Noboribetsu Onsen, Sakura Quality, SDGs
