land speculation; real-estate speculation
Refers to buying land with the expectation that its value will rise, rather than for use or development.
Land speculation was rampant during the bubble period.
A tax system was introduced to curb land speculation.
不動産投資 is broader, covering investment in buildings and rental properties, while 土地投機 focuses on speculative buying of land itself.
Compound of 土地 (land) and 投機 (speculation).