In accordance with the Poisonous and Deleterious Substances Control Law-Poisonous Substance (PDSCL), poisonous substances refer to substances regulated and released by the Ministry of Health, Labour and Welfare (MHLW). Based on their hazards to human health, regulated substances under PDSCL are divided into three categories: poisonous substances, deleterious substances and specified poisonous substances. Poisonous substances are listed in Annex 1 of PDSCL.

일본 PDSCL 유해 물질