This study is to consider the process how “Kaishochi” (the open space in the block), which was planned in early Edo town, transformed into the housing lot, focusing on Nihonbashi area. To understand the landownership of “Kaishochi”, two historical maps (Cadastre) are utilized for this analysis. This paper consists of two contents;(1)landlords and the property forms around “Kaishochi” in the eighteenth and the nineteenth century, (2) “Kokenkin”(land price) around “Kaishochi”. The purposes of this paper are to clarify the aim of possessing “Kaishochi” and to consider the distribution of “Kaishochi” by “Kokenkin”. Through the transition of “Kaishochi”, particular land formation in Edo, the urban space of Edo town transformed through mutual adjustments amongst local community.
