Naniwa
From Halopedia, the Halo wiki
Naniwa is a region or a state on Luna, Earth's natural satellite. It is the location of Crisium City, the birthplace of the Rookie and Michael Crespo.[1]
Trivia
Naniwa is an older name for Osaka, Japan, and is the current name of one of its wards, implying a possible Asian heritage for the region.