Ключевые слова: boiling hot spring water, healing, hiking, hking, hongucho, hot spring, japan, kii mountains, kumano kodo, mineral rich, mountain, oldest onsen town, pilgrimage route, remote village, river, riverbank, shimoyukawa, tanabeshi, trekking, undefinedyunomine onsen, unesco world heritage hot springs, wakayama, wakayamaken, yuzutsu,