不動産 (Fudōsan) refers to real estate or immovable property, which includes land and any structures or buildings permanently attached to it. This term encompasses residential, commercial, and industrial properties. The concept of 不動産 involves both the physical assets associated with land and real estate as well as the legal rights and interests related to ownership, use, and transfer of these properties. In many contexts, 不動産 is also associated with the market activities—such as buying, selling, renting, and managing real estate assets. The term is fundamental in fields such as law, finance, and urban planning, as it is integral to property rights, transactions, and the economy as a whole.