This is a variety carried by Cliff England, I have a grafted one still in a container but I wasn't sure if it's worth growing. Here's Cliff's description of it:
"Hokkaido - Diospyros kaki Persimmon.Cold hardy in zone 6; has never had freeze damage here in Eastern Kentucky. Hokkaido is a natural dwarf--at 8 years old this tree is only 6 feet tall and 5 feet wide. It is a natural fruit producing male to use as a pollinator for other trees also. Fruit shape is conical (shaped like and acorn). Bright orange with a blush of red, smooth flesh and very slow to lose astringency. Needs 2 to 3 weeks stored on a shelf after picking.Fruit size 3.5 inches across by 4 inches long. Cold Hardy Zone 6"
Lucky did your tree produce yet? how to you compare the fruit to the other oriental persimmon?

Hokkaido is a small tree and could be good as a dwarfing stock.