I wonder if there is such a thing as an employee or airline worker cafeteria within NRT. After all, the hundreds if not thousands of daily workers at the airport have to eat somewhere cheaply, and cheap might ironically suggest cooked from raw, bulk, fresh ingredients compared to the pricier processed menus for transiting passengers.
Only thinking of this because I recall a thread on folks discovering the "employee cafeteria" at HNL airport down an obscure corridor, but it happens to be within the secure area and allowable for non-airport staff to access, and apparently cheap and decent local food to boot...