▁he ▁used ▁with ▁the ▁j ō ▁stick , ▁depending ▁on ▁the ▁oppon ent ▁he ▁faced , ▁to ▁provide ▁himself ▁with ▁many ▁different ▁options ▁of ▁attack . ▁He ▁named ▁his ▁style ▁Sh int ō ▁Mus ō - ry ū ▁and ▁challeng ed ▁Mus ashi ▁again . ▁This ▁time , ▁when ▁Mus ashi ▁attempted ▁to ▁use ▁the ▁j ū ji - d ome ▁block ▁on ▁the ▁j ō ▁staff , ▁G onn os u ke ▁was ▁able ▁to ▁wheel ▁around ▁the ▁other ▁end ▁of ▁the ▁staff ▁( because ▁of ▁the ▁reduced ▁length ), ▁forcing ▁Mus ashi ▁into ▁a ▁position ▁where ▁he ▁had ▁to ▁conced e ▁defeat . ▁Return ing ▁the ▁cour tes y ▁he ▁received ▁during ▁their ▁previous ▁du el , ▁G onn os u ke ▁sp ared ▁Mus ashi ' s ▁life . ▁ ▁This ▁may ▁be ▁an ▁emb ell ished ▁story ▁of ▁the ▁creation ▁of ▁j ō j ut su , ▁as ▁the ▁or al ▁tradition ▁of ▁Sh int ō ▁Mus ō - ry ū ▁is ▁the ▁only ▁mention ▁of ▁this ▁second ▁du el , ▁or ▁for ▁that ▁matter , ▁a ▁person ▁defe ating ▁Mus ashi ▁in ▁combat . ▁Wit ness ▁accounts ▁of ▁Mus ashi ' s ▁life , ▁as ▁well ▁as ▁his ▁own ▁writ ings , ▁ins ist ▁he ▁retired ▁from ▁du eling ▁und efe ated . ▁Furthermore , ▁while ▁this ▁legend ▁is ▁the ▁most ▁well - known ▁tale ▁to ▁include ▁the ▁use ▁of ▁the ▁j ō , ▁G onn os u ke ▁cannot ▁be ▁cred ited ▁as ▁the ▁sole ▁cre ator