– Three major quakes rocked Kumamoto in 7,000 years –
According to this article, it seems Kumamoto will be safe again soon, at least for the next 120 years or so. This is only about the northern part of Kumamoto Prefecture. But actually in the south, we still have some after shocks repeatedly, twice a week or so. Though they are no longer that strong, only level 2 – 3 quakes out of 7 of the Japanese earthquake intensity scale.
Regarding the intensity scale of earthquakes, refer to the following link.