Starting off the day with breakfast at Dean & Deluca near Shinjuku station.
Walked around the area before feeling some Japanese curry, Nakamuraya 中村屋 came to mind, ate the whole plate of curry rice in a flash, make sure you get the ice-cream to finish off!
For dinner, a sushi restaurant we booked months in advance : Sushisho Saito すし匠 斎藤 (not to be mixed up with another Sushi Saito which has 3 Michelin stars ) This Sushisho Saito is located in Akasaka with only 12 seats. Way better than stared Saito, super creative with how they prepare their sushi, a MUST try best kept secret!
Bar Ben Fiddich happen to be in Shinjuku as well, heard so much about this little cocktails bar hidden in some commercial buildings. Again, without drink menu, just tell them the cocktail base of your choice. Get a boozy drink before you off to bed.