A nice sake set? Even if their not Japanese, everyone like sake. I think. Except for people who don't drink I guess.
And a sake set not in the sense of the glass/ceramic flask and cups but rather a combination of like 3-5 different sakes. Well, I just looked and doesn't look like these exist
however you could be creative and buy different kinds on your own and put it together in a wodden box or something. Make it look classy like those liquor sets they sell. Probably can order everything through amazon. Guessing like $50 for everything. Also by different, I don't mean just brand. Look into the types of sake.
Orrrrrr......just do the flask and cups sake set. More conventional a gift I suppose.