Nikko is a shield volcano. All five of the historic eruptions have been at the Shirane-san lava dome. They began in 1625 and the most recent was in 1889. Most of the historic eruptions have been moderate to moderate-large in size (VEI=2-3) and phreatic. All photographs courtesy of and copyrighted by Mike Lyvers.
The next three photos are of Nikko's waterfalls.
VolcanoWorld wishes to thank Mike Lyvers for generously sharing his photographs.
Source of Information:
Simkin, T., and Siebert, L., 1994, Volcanoes of the World: Geoscience Press, Tucson, Arizona, 349 p.