It is a Shinto ritual to tell a fortune about a good or bad harvest for the year, and Shinto priests of judge the fortune by the results of a target shot by azusayumi (a bow made of Japanese cherry birch).
その土地の一年の豊作を占う神事で、神社の神主や神官が梓弓で的を射抜きその状態で吉凶を判断した。