Yamaboshi City

The city in which the events of Kokoro Connect Takes place. The town is not explicitly named but the signs on the subway in the anime shows the station is called Yamaboshi North and the writing on the posters during the Club Presentation has the city's name on them

Description
A large city with residential and shopping districts. A large river goes across the town.

Trivia

 * The city featured in Kokoro Connect is based on Yokohama city.
 * In the novel, there was only one hint that this was in Yokohama. The hint was the ferris wheel on top of a shopping mall which is only found at the Mosaic Center of Yokohama City.

Reference
Comparisons of Anime and Real Life