[TheTakoTank]

Quote:

Originally Posted by Dr Kain

Because they did not know what the outcome would be of sealing all 52. Besides, they also did not know the cards would be permanently locked either.

But Hajime knew, why didn't he tell them? Why didn't they just unseal Shima and Category Queen before Tachibana sealed the Category King and avoid any potential disaster if Joker won? It's a minor complaint, and besides the ending was perfect with Kenzaki's decision.