Osaka is a former city on Earth. It was the 3rd largest city in Japan, and housed over 19 million inhabitants. However, it was the final city to go down in the Decimation, and much like Tokyo, it too is almost completely run-down and mostly inhabited by zombies and uncivilized people. It was also the place where Keisuke spent most of his days and where his sister Suzuka was built.
Characters from Osaka
Keisuke Grommell (spent most of his time before Crestfall here, but he was built in Toronto)