One Piece: Little Yamato (Episode 1048)

This is from a 20-year flashback where Yamato was fighting off her father's Beast Pirates to make sure she's Kozuki Oden. Her father, Kaido, imprisoned her along with three samurai after retraining her. The three samurai: Ushimaru, Uzuki, and Omusuki were kind to her and trained her how to fight and offer her their food. After she found Oden's journal from the destroyed Oden Castle and read it, the samurai realized that in two decades, the next era would come and will take the New World along with Wano by storm. After 10 days, the samurai resolved to escape from the cave after seeing that Kaido had no plans on releasing his own daughter. They also had no intention of rotting away inside the cave and while they would not be able to see the battle that would happen in 20 years, they were reassured knowing that people like Yamato would still be there to fight for Wano.

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