Abstract
As factories in the Yokkaichi petrochemical industrial complex faced severe economic conditions in the late of 1990s, not only new construction but re-construction of their plants was not conducted. Therefore greening in factories could not be improved. To promote factory greening, Yokkaichi city made a bylaw to facilitate construction and expansion of factories, a local rule and an exception related to deregulation of the Factory Location Act from the late of 1990s to the early 2000s. This paper grasps a concept of these measures of factory greening to coordinate factories and surrounding environments, analyzes effects and problems of them.