There's no "American Hachiya". It doesn't exist. If it's a Hachiya it's a kaki persimmon.

Can someone identify what type it is? I thought I bought Hachiya, but now I'm not so sure...

One way to check the identification of your tree would be to make in person comparisons with persimmon plantings at a USDA Extension Service fruit trial, an arboretum, botanical garden, nursery or the private collection of a fruit enthusiast.

Even a Hachiya is dioecious so a tree may have only male or female flowers. Some are monoecious with both male and female flowers. If you bought the tree from a certified nursery they would have grafted the tree to make sure it's a monoecious specimen. That should be evident at the base with a collar scar where the graft occurred. For trees grown from seeds, one cannot tell until they flower. So if this is a seed-grown tree, you may be right that it's a male tree. It may still be a Hachiya but a male Hachiya. Unless you live in a cold climate like the Midwest, Diospyros virginiana is less likely offered as a nursery tree.

@otcayI got it at an ace hardware nursery store in northern California. The base doesn't look perfect,

but that might've been caused by the gardener's weed whacker sometimes back. See picture.

@Embothrium The nursery around here usually doesn't have persimmon plants and if they do it's sold out really fast, so it's hard for me to go and compare.

Does the scar go all the way around? It doesn't look like a full collar. I believe the seed-grown trees will take 7Y to mature enough to bear whereas grafted trees fruit right away since the parent had already fruited and the graft thinks it's a grown tree.

Yes it looks like it goes all the way around. At the the color seems like it.

If it's a grafted tree and yet produce only male flowers then I'm stumped.

Those leaves look entirely like Asian/kaki persimmon leaves, not at all like American. Do you remember whether the flowers were borne singly or in clusters of three? I've never actually seen male flowers on a kaki before -- all my trees have only produced female flowers, because those are the only types I've grafted (except for a couple too recent to flower yet) -- but on American persimmons female flowers are all borne single, same as female kakis, but on male Americans the flowers are borne in clusters of three.

I'm guessing your tree is true to variety and will bear fruit soon.