Japanese local wine made from wild grapes of Fukui

Wild grapes are grown in the cold mountains.
They contain much polyphenol especially.
Hakusan Winery in Ono City, Fukui Prefecture produces the wild grape wine.
The wine has a sweet-and-sour taste but also you can feel the strength of wild species.
I like that, too.
It also would be nice to have hot wine on a cold winter’s night
as it makes warm your body from inside. (H.S)