The Japan Meteorological Agency (JMA) has raised the alert level for Zaozan volcano in northern Honshu from 1 to 2 on Tuesday, January 30, 2018, following a number of volcanic tremors and a slight inflation of ground in one area. Mount Zao is a popular tourist resort area famed for its ‘snow monsters’ created by water vapor freezing on trees in winter. The last eruption of this volcano took place in 1940.
https://watchers.news/2018/01/30/alert-level-raised-for-zaozan-volcano-in-japan-its-last-eruption-was-in-1940/