セイナンニホンナイタイ
Meanings
Noun
1. area of southwestern Japan north of the Median Tectonic Line
Composed of
① 《地質学》フォッサマグナを境として、西側の日本列島。
area on the concave side of a mountain arc or a crescent-shaped archipelago; area of southwestern Japan north of the Median Tectonic Line