|Ichiro's Malt Chichibu French Oak Single Cask #2357 (photo from Isetan blog)|
I'm not suggesting that this bar is a good place to hang out with friends, but if you're looking to buy some whisk(e)y you haven't tasted, check and see if the bar ("tasting counter") is serving it. You can't miss it once you find the whisky section. For a tiny price (like a few hundred yen), you can get a taster, and some info from the bartender too, depending on how good your Japanese is, or how good their English is.
|Tasting Counter (photo from Isetan blog)|
The bar also stocks some other liquors like gins, and it looks like the selection for tasting changes regularly. I went once in January this year, and once in September, and both times the selection looked completely different.
There is a pretty high tax and/or margin on alcohol here, so I wouldn't suggest buying something that's easily available at duty free shops at the airport (eg. common labels under the Nikka umbrella).
There's also a huge sake selection and very decent wine selection (plus a part called "Grand Cave" for fine wines, also with a mini tasting bar, but the selection there was only so-so when I last visited).
Food Hall B1/F
+81 3 3352 1111