The four deities purify "Ashihara no Nakatsukuni" (Literally, "Central Land of Reed Plains", which refers to the human world) by removing all the sins and evils; the roles of each deity are described in the 'Oharae no kotoba.'
これらの神は葦原中国のあらゆる罪・穢を祓い去る神で、大祓詞にはそれぞれの神の役割が記されている。