研究ノート The complex sequence of 2016 Kumamoto earthquake caused some problems on disaster information. The main earthquake occurred on 16 April with the magnitude 7.3. This earthquake involved significant foreshock that occurred 2days ago with M6.5. Because almost all the earthquake had the Mainshock-Aftershock sequence with no foreshock sequence, the government statement about this earthquake had a serious problem for the evacuation. We researched the background of this failed statement.