What Japanese maple has a tight dense growth habit and is somewhat columnar, with a typical palmatum leaf? This business has several of them planted around the grounds, and I'm surprised that I'm at a loss for a guess as to what cultivar they might be. Tsukasa silhouette comes to mind but that seems pretty esoteric. Especially to have several of them of this size.
That's also what I guess, but maples can sometimes look all the same but different so it's hard to be sure.
If there are several of them planted, and they are all the same shape, then it'll be a cultivar. Seedling-grown trees are diverse in shape, each one different to others.
Internodes look to be pretty short, with compact habit that further indicates a selected form/cultivar. Maybe check out the colour next spring, any identifying features more likely to be apparent at that time of year?
dichotomous keys are :bark,flowers,form of the leaves ,fruits, habitat,autumn colors,Spring colors,trunk. Is also possible graft Acer palmatum on the rootstock of the another species of section "palmata" like for exampleAcer circinatum .
