Even on vacation, Goemon has eyes for nothing except swordsmanship. A girl named Naomi then deliberately sabotages his straw dummies used for swordsman practice. Her grandfather is a sword-smith, and he wants to make a katana better than the Zantetsuken. Naomi puts her heart into supporting her grandfather, and they soon discover Zantetsuken's secret. Who will hold the true legendary blade?!

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