四國
地震風險：very-high
Kochi Prefecture 地震風險
Kochi directly faces the Nankai Trough on Shikoku's south coast. Government simulations project tsunami wave heights up to 34 m at some locations, with arrival within minutes. Some coastal points would be inundated before official warnings can even be issued.
主要斷層・地震帶
Kochi Prefecture faces the Nankai Trough directly on Shikoku's south coast. Government simulations project tsunami heights up to 34 m at some points, with arrival within 3 minutes at the most exposed locations. The survival rule: evacuate immediately upon strong shaking — do not wait for warnings.
主要斷層線
南海海槽