indoor hot spring bath at nyuto onsen hot spring in green mountain valley in semboku city, akita prefecture, tohoku region, japan

akita ancient bath bathing city culture green heal health historic historical history hot indoor japan japanese landmarks milky mountain natural northe nyuto nyutou old onsen onsenkyo prefecture recovery region relax resort rustic ryokan scenic secret semboku spa spring tohoku tourism traditional travel tsurunoyu valley warm water white wild wood