/ Edit Post. Email. Mirin is sweet rice wine, used primarily to flavor Japanese dishes. A recent discussion on Chowhound noted that aji-mirin is the more commonly available sweetened product, easy to find in Asian groceries and some supermarkets.And while paulj thinks Kikkoman aji-mirin resembles flavored corn syrup, it's fine for many recipes. recent discussion on Chowhound noted that aji-mirin is the more commonly available sweetened product, easy to find in Asian groceries and some supermarkets. And while paulj thinks Kikkoman aji-mirin resembles flavored corn syrup, it's fine for many recipes.