2024/9/7 I'm travelling using a free pass called "seisyun18kippu" with my friend from high school. Today is the second day. We visited Doai Station, which has the deepest underground platform in Japan. As soon as we got to the platform, we were surprised by how chilly it was. It was 15℃ cooler than outside. After we completed the 482 steps, we enjoyed hiking on Mt. Tanigawa. We were refreshed by the magnificent scenery that was formed by an iceberg.