One Piece Season 21 Episode 980
A Tearful Promise! The Kidnapped Momonosuke!
Swept away by Kanjuro, Momonosuke remembers his father, tries to rise above his fear, and speak to his allies. Luffy and the others start heading for Onigashima, but Kaido’s army gets in their way again with a formidable weapon. However, a surprising figure comes to help the cornered Straw Hats.