A while ago we recieved a bottle of red wine - it's infact more purple than red - from Masa's aunt. We finally opened it up and were pleasantly surprised. My first reaction was "wine juice". It is very fruity and lite. Red wine usually makes me feel a bit ill but this doesn't. I believe the grapes are niagra concord - at least I think that is what the bottle says.
You can find it here via an online. The site is in Japanese. It appears they make a white version as well. I will definitely be checking it out.