Uda is a lefty. They should've gone for Togami. He's right-handed and the only one who took out Mizutani at the ATTC 2021 trial. Uda lost badly to Mizutani and Sora Matsushima in the group.
Togami made good progess and I would have preferred him over Niwa for sure. COVID made it hard for these young players because almost all world tour tournaments were cancelled last and this year.
I don't see how they can win against Korea, they have to rely on two Harimoto wins once again which isn't guaranteed as we could see today. If he wins two singles hoping for Mizutani is their best.