According to USGS, this earthquake is 5 km east-northeast of Kumamoto at a depth of only 10 km. I’m afraid the damage to the city of Kumamoto is going to be substantial. :-( They’ll probably eventually suspend all Kyushu Shinkansen services south of Kurume.
An update: USGS now reports it a Magnitude 7.0 0.62 miles west of the center of the city of Kumamoto. There’s going to be a lot of damage in that city if it’s really that close to town.... :-(
Prayers for the people of Kumamoto...