Our life is supported by any kinds of living bases. But where do they come from and where are they going? We would like to research such invisible part of the living base and clarify its macro structure. Is it centralized and will be disrupted and shut down due to various disasters and conflicts?Also, I would like to compare this structure with the past from the side of circulation, and propose living architecture as part of the circulatory system. This is an attempt to find a living base and the realization of a community that establishes it on the premise of a network of information environment .