In a series of shots showing every single one of the Nine Red Scabbards in the newest One Piece opening we probably got an indirect confirmation that Kyoshiro is in reality the 9th Red Scabbard Denjiro.
Rewatch the opening and look at the scene where they show the Nine Red Scabbards. We get:
Kinemon, Kawamatsu and Kiku
Raizo and Kanjuro
Nekomamushi and Inuarashi
Ashura Doji and Kyoshiro
Does this means Kyoshiro is the 9th Red Scabbard Denjiro?
Why would they include Kyoshiro in the shots of the Nine Red Scabbards?
This is too much of a coincidence!