Travel Sadogashima, Niigata (新潟県佐渡島) – Sado Kinzan Gold Mine (佐渡金山) Ogiriyama Mine Yamashi tour (山師ツアー) September 28, 2025
Travel Sadogashima, Niigata (新潟県佐渡島) – Hotel Oosado (ホテル大佐渡) Premium Suite (プレミアムスイート) tour 2025 Sep. 10 September 28, 2025
