The world now has its first officially Vegan sake, coming from Iwate Prefecture's Nambu Bijin.
By nature, pretty much all sake is probably Vegan anyway, since it's generally only made from koji, rice, and water. But actually obtaining certification as a Vegan product is a different story, as that requires inspection of ingredients. All told, it took Nambu Bijin about 4 years to get through the process.
Nambu Bijin--all of their products!--are now certified Vegan by VegeProject Japan for domestic purposes, and also certified by The Vegan Society to use the trademark for overseas/export purposes. It's also certified kosher!
I’m Whiskey Richard, and I am the founder of nomunication.jp. I’ve lived in Tokyo for over a decade, and I am a certified Shochu Kikisake-shi/Shochu Sommelier (焼酎唎酒師), Cocktail Professor (カクテル検定１級), and I hold Whisky Kentei Level 3 (ウイスキー検定３級). Click here for more details about me and this site. Kampai!