There is an Asian take-out restaurant in the concourse and ANA gives out meal vouchers to lounge-eligible pax, but the restaurant closes at midnight, an hour or so before boarding time (departure is at 1:45 am). Other shops in the terminal close at 11 pm, and United's lounges all close at 10:30. So you will end up spending a good hour in a desolate terminal with access to nothing but restrooms and vending machines.