[がいたい, gaitai] (n) (1) (See 内帯・1) area on the convex side of a mountain arc or a crescent-shaped archipelago; (2) (See 西南日本外帯) area of southwestern Japan south of the Median Tectonic Line
[ないたい, naitai] (n) (1) (See 外帯・1) area on the concave side of a mountain arc or a crescent-shaped archipelago; (2) (See 西南日本内帯) area of southwestern Japan north of the Median Tectonic Line