The company needs financing to manage a company. We divide method to finance into three classes-operating profit, direct financing, indirect financing. But it is difficulty that small and medium enterprises make use of direct financing or indirect financing. And operating profit is irregular in small and medium enterprises. Especially, though small and medium enterprises take out a loan from financial institution, financial institution demand security to secure claims from small and medium enterprises. But current financing transactions are heavily focused on security interests in real estate. So small and medium enterprises that have real estates are in financial difficulty. It is necessary for small and medium enterprises to introduce a new financing transactions system. Movable property, claim and intellectual property right have been used as popular security device in financing transactions. And in the current law, there is not regulation about the concept of building becoming a target of the real-estate registration. We only must satisfy the required conditions to be acknowledged as a building which becomes a target of the real-estate registration by judicial precedents and the regulation concerned with registration: ① a building has to be got settled firmly at the land. ② a building has to be divided in structure(for example: a roof. the four walls of a building and so on). ③ a building may be independently used. So building being in course of construction can not be registered in the current law systems. As a result, various problems(for example: limitation of exercise of the right of property) have arisen. So, in this study, I would propose new methods- ① introduce new security rights for movable property, claim, intellectual property right, ② introduce new system to register buliding being in course of construction.