Is drinking old sake harmful?

Question

I have a bottle of sake from Japan from about...five years ago or so. It's been corked and never open and stored at room temperature. Would it be harmful to drink it?

Answer 1

No, if anything it might have changed to vinegar, but it won't hurt you unless you see something strange growing on it when you pour it... sediment isn't a bad thing, but anything floating i would suspect.

Answer 2

i don't know.

Answer 3

Smell the cork, if it smells like vinegar then do NOT drink it, you have a rotten cork. Otherwise, sake never goes bad, like most liquors, drink it up. Now it's aged, or koshu, although you didn't use a common aging technique, I don't think. You may find it better or worse depending on your tastes.  

Answer 4

I don't see why you can't drink it - I would!!!