Abstract
Until very recently, the Japan had no law in place requiring contaminated land to be clearly identified by a regulatory agency. Neither was there a law in place requiring an owner or a developer of contaminated land to: delineate the contamination present on that land; evaluate the significance of this contamination; assess the risks it poses to human health or the environment; or clean up the land to an acceptable state. This paper is discussed on the background and approch to the law system that operates in the Japan.