Abstract
The Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) is an international project which attempts to directly observe the seismogenic megathrust fault of the Nankai Trough where large earthquakes have repeatedly occurred in the past. In this talk, I will briefly introduce the outline and current state of the NanTroSEIZE project, as well as our interest from the geological view point.