Chiba and Mito meet around the first press and the ball that follows it. Chiba have several runners who can turn a delivery into a second chance. Mito's work under Mori puts more emphasis on forward pressure and quick attacks.
Chiba's strongest connection is between Yasui's service and the movement of Himeno, Mae and the forwards. Against Fukuoka, Mae's effort brought Himeno's rebound goal, Yasui crossed for Mae, and Ishikawa later supplied Goya. Mito's recent Cup concessions came from a corner rebound and a far-post cross, making those receiving positions particularly relevant.
Mase's suspension removes a regular wide runner and defender from Mito. Yasui and Erison both started Chiba's previous match after earlier injury-related substitutions, while the expected goalkeeper change for Mito remains a preview projection.
I expect an opening battle over pressure and second balls, followed by Chiba using width and fresh receivers as the match develops. The Goya–Ishikawa connection gives that attack a demonstrated option beyond the starting forwards. That's why I'm siding with Chiba to win.