@jazei As far as I know from first to last pic:

1. (Center building) Mode Gakuen Cocoon Tower (fashion, technology & design school, medical college)

2. Metropolitan Government Building (the observation deck is free!)

3. Nishi-Shinjuku 3-Chōme (residential, cant imagine the rent)

4. Sompo Japan Insurance Head Office Building

5. Cant remember the exact location 🤷