Genzan Yorimasa was a brave warrior and a very useful man who lived more than eight thousand moons ago. On account of his valor and skill in the use of the bow he was called to Kioto, and promoted to be chief guard of the imperial palace. At that time the emperor, Narahito, could not sleep at night, because his rest was disturbed by a frightful beast, which scared away even the sentinels in armor who stood on guard.