Day 5. Haneda Airport.
There are many fine restaurants and shops in the Edo-Koji shopping area of Terminal 3 at The Haneda airport. Unfortunately they are all closed by 10pm.
My flight was at 5am so I had plenty of time to roam around in a mostly empty International terminal that never closes.

https://tokyo-haneda.com/en/shop_and_dine/search_r.html