A light-brown complex in a residential area in western Tokyo’s suburban city of Fuchu could easily be mistaken for a city hall.

But a closer look at the stone inscription at its entrance reveals the identity of this facility: Fuchu Prison, Japan's largest, all-male penitentiary.

It also houses the biggest population of foreign prisoners in the country, and as such it is taking measures to accommodate them in terms of language, culture, food and lifestyle.