McCullough would be too strong for Joichiro. Wayne takes a decision in a war. Joichiro beats Jacob. Joirchiro vs Seabrooks is a tough fight, as Joichiro wasn't on the same planet as Canizales. I would favor Joichiro, but not by much.
I can see Tatsuyoshi vs McCullough going either way. I tend to agree with explosive though that McCullough out-muscles him and takes a decision. He'd catch up to Tatsuyoshi and give him a pasting in the late rounds. No doubt it'd be an all-action war, though. I actually think Jacobs could win this. He gave Seabrooks hell, Vazquez two close fights before getting stopped, as well beating Zaragoza and McKenzie. I think he can win, but Tatsuyoshi most likely comes back from adversity to stop him. I think Seabrooks vs Tatsuyoshi is like the bantamweight equivalent of Saad vs Gatti. Obviously not in actual ability, Saad was way above all three. I think Tatsuyoshi might nick a close decision, if he treats Seabrooks like he did Richardson, and really keep it on him.