That "maxing out" at 3-4 feet is more likely to be a 10 year size - both can get larger than that, the Kamagata easily double (maybe even triple) and the Shishi more like 5-6'.

There is no direct relationship between container size and mature height - you can keep quite large trees in rather small pots if you are willing to devote the attention they will need. I purchase virtually all my maples in 1G containers and almost immediately pot them up to 2 or 3G. After a year I will pot them to a larger, permanent size, generally nothing larger than a 10G (or equivalent). Then it is just a matter of periodic repotting and root pruning.