These were the four wineries I visited: 4. Asaya
This is a winery where you can taste wine that are only available in Japan. What I found unique about the wine here is that they are kept in Japanese Shochu (distilled spirit) bottles, which sort of brings out its Japanese-ness. I found the wine here to be generally sweet, and maybe that gives people who don't like the bitter taste of alcohol a chance to enjoy wine, too.