noun
purification of the six roots of perception
Buddhist term referring to cleansing the six sense organs (eyes, ears, nose, tongue, body, mind) of defilements. Often chanted as a mantra during mountain ascetic practices or pilgrimages.
修験道では「六根清浄」と唱えながら山を登る。
In Shugendō, practitioners chant 'rokkon shōjō' while climbing the mountain.
From Buddhist terminology, combining 六根 (rokkon, 'six roots of perception') and 清浄 (shōjō, 'purification'). The exact historical derivation is uncertain, but the phrase is well-established in Japanese Buddhist practice.