This report aims to explain the structural futures of the cocoon warehouses of Shimosuwa Soko Company and the developing process of the warehouses in Suwa area. The four cocoon warehouses, mud-walled and multi storied, were built in 1901 and 1912. To realize more stories and spaces in newer ones, the company adopted the new structure plan containing the wider spans between beams, European roof truss, and the two storied pillars. As the new plan is similar to others in this area, it can be said the unique and local building plans including western technique were developed in a short term.
