What is "metropolismania"

Metropolismania is a PlayStation 2-only city-building game released on October 3, 2002 published by Natsume. The object of the game is to interact with NPCs in order to populate various towns. The game was released under a traditional CD-ROM format, uncommon to the PS2. A sequel was announced by Natsume, titled Metropolismania 2. The title was released on August 21, 2007 in North America and in Japan on July 13, 2006 by D3 Publisher. Another sequel, Metropolismania 3, was released for the PlayStation Portable by D3 Publisher but in Japan only.