noun
land shark; land speculator
A person or company that aggressively buys up small plots of land, often using coercive tactics, to assemble a larger site for development. The term carries a negative, predatory connotation.
あの地域では地上げ屋が暗躍しているらしい。
It seems land sharks are operating behind the scenes in that area.
地上げ屋に土地を売るように迫られた。
I was pressured by a land speculator to sell my land.