PROBLEM TO BE SOLVED : To improve the fluidity of real estate assets or the like by achieving at long-term stability and maximization of profit of an owner of the assets including the real estate, simplifying purchase of the assets for a consumer, and simplifying fund recovery for financial institutions, such as a bank.SOLUTION : A plurality of real estates are managed collectively and, at a fixed ratio calculated in advance, the profit is stably shared by each owner even when the real estate owned by him or her does not operate. Also, by the collective management of the plurality of real estates and stable profit-sharing, the profit is maximized, and fluidity of the assets is improved by using scale merits, such as reduction in communication costs, service improvement, and use conditions of the financial institutions.COPYRIGHT : (C)2007, JPO&INPIT