Volcanic Activity Warning: Mt. Yakidake, one of the most popular climbs from Kamikochi, has experienced higher-than-average volcanic activity lately. As August 11th is the “Mountain Day” holiday in Japan, many people will likely go mountain climbing in Nagano. If you choose Mt.Yakidake, we recommend proper precautions such as a helmet, and to stay away from the vents / volcanic smoke. Japan’s government has not changed Mt. Yakidake’s volcanic level from 1 (lowest) as of yet. https://headlines.yahoo.co.jp/hl?a=20170810-00003743-cbcv-soci
Info on climbing Mt. Yakidake here: https://www.unique-nagano.com/detail.php?id=301