As the reputation of Sasaki Kojiro, who traveled through various provinces with his long sword seeking duels, began to spread, he was summoned by Lord Hosokawa Sansai upon the recommendation of Kokura clan warrior Iwama Kakubei. However, at this time, due to the proposal by Nagaoka Sado, it was agreed that Kojiro would face Miyamoto Musashi in a duel. If he won, Kojiro would officially become the chief instructor, as he desired. Until then, he had a provisional stipend of 500 koku. Learning that Musashi was in Kyoto, Kojiro set off for the city. En route, he was joined by a woman named Shino, who held a grudge against Musashi.

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