お世話になっております。17:02の観光案内を聞きました、多分内容は: Hisuikyo valley is part of the Hida-Kisogawa Quasi-National Park. If you look out at the rocks, you will see many holes. These are called pot holes, and they have been designated as a natural monument of Japan. The pot holes were formed by stones from the bottom of the river, being caught up in (riveted, ちょっと不明) whirlpools, and (found) against the rocks, eventually wearing them down. 11月25日のファンイベントを参加しました、車内放送体験の準備のために、自分がもう1回この動画を見ればいいと思います。😭