The Kal lounge airside @ NRT T1 (only airside lounge) is pretty basic too

Cup noodles, snacks (cookies, rice crackers), onigiri, drinks (soft drinks, beer and some liquor), no showers.

Sometimes they stop accepting PP (they put out a sign saying over capacity), but enough people leave after 1 hour and the remove the sign

If you exit and go towards the north, the two shops there have KitKat samples (other shops don't usually have KitKat samples)