http://www.volcanocafe.org/a-wedge-of-worry-aso-caldera-ndvp-4/
That’s a good article about the Aso complex.
Yikes! Taking a look at the article and the USGS earthquake map, the city is right on top of that area and all 24 magnitude 4.5+ earthquakes the past couple of days have been right underneath them!
I have watched several hours of coverage on Japan news. The death toll is up to 29, and 1,600+ treated in hospitals. Roads out bridges damaged. Some areas isolated. Helicopters shown loading 10 people on board, or hauling up a litter by rope with injured person. Mud slides, a cascade of water over one destroyed road area, and they are predicting heavy rains this weekend.
Here are a number of photos and maps of the affected area.
https://www.google.com/search?q=japan+earthquake+april+2016+images+and+photos&biw=1600&bih=799&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwim-YypzJLMAhVENj4KHRObC6gQsAQIGw