How-to-Drink-Japanese-Sake-Like-a-Total-Boss-Photo3 has a nifty classification guide to make things a little clearer.

If you need any more reasons to try sake, consider that it has no tannins or sulfites and it’s less acidic than wine so you’re less likely to have an allergic reaction or wind up with a splitting headache. And if you’re having trouble sleeping, just add two or three glasses of sake to your bath for an even more soothing soak.