今回は水量が少なかったのですが、腰くらいまで来るときもあるそうです。
昔は各柱が我先にと飛び込んですごかったそうですが、最近は事故防止のために順番に川に入るみたいですね。

The water level was low this time, so I hear there were times when it came up to people's waists. I hear that way back when, it was something else as each log plunged in, scrambling to be first. These days, it seems they enter the river in turns for the sake of accident prevention.