I have one. They grow very well and are good producers where I live. It gets very hot and humid during the summer, doesn't usually drop below -5 C during the winter. Not sure how they handle long periods of cold below that.

You can grow them on anything you like, mine are extremely vigorous and easy to grow if you give them lots of sun and don't let them dry out.

Well you're from Nippon zone 9b..thats way warmer than my zone here

Where can one buy the kyoho grape vines in the United States? I am in humid zone 9a with mild winters. I have found that many Asian plants seem to do very well here. I would like to try these grapes.