| 西南日本 | [せいなんにほん, seinannihon] (n) (See 東北日本) southwest Japan (southwest of the Itoigawa-Shizuoka Tectonic Line) [Add to Longdo] |
| 西南日本外帯 | [せいなんにほんがいたい, seinannihongaitai] (n) (See 西南日本) area of southwestern Japan south of the Median Tectonic Line [Add to Longdo] |
| 西南日本内帯 | [せいなんにほんないたい, seinannihonnaitai] (n) (See 西南日本) area of southwestern Japan north of the Median Tectonic Line [Add to Longdo] |