四國
地震風險：very-high
Tokushima Prefecture 地震風險
Tokushima is on Shikoku's east coast directly facing the Nankai Trough. A significant portion of the prefecture's population lives within the projected tsunami inundation zone. The Median Tectonic Line — Japan's longest fault system — runs through the prefecture.
主要斷層・地震帶
Tokushima Prefecture faces the Nankai Trough directly from Shikoku's eastern coast. The Median Tectonic Line (Chuo Kozo-sen) — Japan's longest fault system — runs east–west through the prefecture. Some coastal areas face tsunami arrival within 5–10 minutes, and a large percentage of the prefecture's population lives within the projected inundation zone.
主要斷層線
南海海槽 中央構造線