1.
mainland
The main body of a country's territory, as opposed to islands or overseas territories.
本土に戻る。
To return to the mainland.
沖縄から本土へ飛ぶ。
To fly from Okinawa to the mainland.
本土と離島では気候が違う。
The climate differs between the mainland and remote islands.
本土 refers to the mainland.
JAPAN CONTEXT:
In Japan, 本土 usually refers to the four main islands (Honshu, Hokkaido, Kyushu, Shikoku) as opposed to Okinawa or remote islands.
CONTRAST:
- 本土: mainland
- 離島: remote island
- 本州: Honshu (main island)