In the early stages, the participants were cheering on the slippery dirt zone on the steep slope.
In the middle, I am trying to ride through the difficult rock zone, but it is difficult.
The narrow groove zone at the end is fun because you can pick up some speed, but as the steps increase, the difficulty increases and you stop.

This video is from a riding event hosted by Kosuke Oki of Okidoki Lifestyle (https://www.facebook.com/okidokilife).