Gonnosuke then withdrew to a Shinto shrine to meditate. After a period of purification, meditation, and training, Gonnosuke claimed to have received a divine vision. By shortening the length of the bō staff from roughly 185 cm to 128 cm (or, in the Japanese measurements, four shaku, two sun and one bu), he could increase the versatility of the weapon, giving him the ability to use techniques created for the long staff, spear fighting and swordsmanship. The length of the new weapon was longer than the tachi (long sword) of the period, but short enough to allow the reversal of the striking end of the jō in much tighter quarters than the longer bō. Gonnosuke could alter the techniques he used with the jō stick, depending on the opponent he faced, to provide himself with many different options of attack. He named his style Shintō Musō-ryū and challenged Musashi again. This time, when Musashi attempted to use the jūji-dome block on the jō staff, Gonnosuke was able to wheel around the other end of the staff (because of the reduced length), forcing Musashi into a position where he had to concede defeat. Returning the courtesy he received during their previous duel, Gonnosuke spared Musashi's life.
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