low uplands; intermediary area between plains and mountains
中山間地域の過疎化が進む。
Depopulation in the low upland areas is advancing.
中山間地域の農業を守る補助金が始まった。
A subsidy program to protect farming in the low upland areas has launched.
自治体が中山間地域の若者定住を促す支援策を打ち出した。
The municipality rolled out support measures to encourage young people to settle in the low upland areas.