noun
mainlander; person from the mainland
Refers to someone from the main islands of Japan, often used in contrast to people from Okinawa or Hokkaido. Neutral term, but context may imply a distinction from local populations.
沖縄の人にとって、本土人は少し違う文化を持っているように見えることがある。
To people in Okinawa, mainlanders can sometimes seem to have a slightly different culture.
彼は本土人だが、北海道の生活にすっかり慣れた。
He is a mainlander, but he has completely gotten used to life in Hokkaido.