The man in photo is 坂本, but, of course, his name is a false name. You will probably be assigned to the Public Security Section 9.
Occupational Category: Special law-enforcement agent
Description of Business: Prevention, suppression, investigation of crimes, arresting of suspects, direction and management of traffic, and etc, activities for keeping safety and peace in Tokyo.
The Tokyo Police rejects ones who don’t have nationality of Japan. However, I don’t know why they don’t write “accept only ones who have nationality of Japan”. It is possible that it can sound like rejecting ones who have other nationalities in addition to Japan. You can apply to it if you also have the US citizenship, anyway.