As of May 24th, 2022, the eruption warning level of Kamikochi’s only active volcano, Mount Yake, has been raise to Level 2. As a result, access to the area around the crater has been restricted.
According to current regulations, no visitors will be allowed to venture within 1km of the mountain top. This is regrettable as the Mount Yake route is one of the most popular day hikes in Kamikochi. As with all such things, though, it’s a matter of “safety first.”
Further info on the mountain along with some insights on volcanic activity can be found in the post from earlier this year: https://www.kamikochi.org/uncategorized/in-the-shadow-of-mt-yake
Information may be seen in Japanese on the Japan Meteorological Agency’s homepage: https://www.data.jma.go.jp/svd/vois/data/tokyo/STOCK/activity_info/310.html
Thanks as always to the fine folks at Five Sense for sharing this info in the original post.