Kirk here. I saw a segment about this little vegan ice cream shop in Yamato-cho (not far from Tsujunkyo) the other day. I haven’t had a chance to taste the ice cream yet but I fully expect to enjoy it when I finally get a taste. If my memory serves me correctly, in the news segment ARBOL (see picture) said she tasted vegan ice cream while traveling abroad and decided she wanted to do something similar in her home town of Yamato-cho.
https://www.facebook.com/p/ARBOL-Dairy-Free-Icecream--100083466543973/
The exact address is on the Facebook page.