Tokyo Metropolis (Itabashi City 2). (Schoolgirls' Uniforms of Japan.)
These are uniforms for schoolgirls of one junior high school in north of ShinItabashi Station, Toei Mita Line, Tokyo Metropolitan Subway, in Itabashi City, Tokyo Metropolis.
About the Summer Uniform.
The summer cloth is a white blouse and a navy blue suspender skirt.
About the Winter Uniform.
On the other hand, the winter cloth is a navy blue sailor blouse with three white stripes on its navy blue collars and a white tie bound with a band embroidered the school emblem.
A skirt of the summer cloth is a suspender skirt, so one of the winter cloth may also be, but Producer has no idea if it is true.