Originally, setsubun is the set of dates in the lunar calendar that precede the transition from one season to another. During these days, man is vulnerable to the change of climate and his body requires a period of physiological adaptation. This sensitivity to the external environment was attributed to the harmful energies of demons. Thus, exorcism ceremonies were held in palaces and temples between the 8th century and the Edo period (1603-1868) when the ritual became more democratic and focused exclusively on marking the beginning of spring.