Shinanomachi is a district of Shinjuku Ward and the name of a station on the Chuo-Sobu Line in central Tokyo. It’s located close to the Meiji Shrine outer garden which also houses a lot of sports grounds (like Jingu Stadium and Chichibunomiya Rugby Stadium) as well as providing quick access to Nico Nico Park. Nico Nico Park is a kids adventure playground about 200m to the east of the station. You need to buy (cheap) tickets at the entrance to get in.
Colorful summer festivals and other fun coming up!