Mihawa Ward is located in northwestern Chiba Prefecture, and consists entirely of reclaimed land from Tokyo Bay.

Reclamation of 19 kilometers of white sand beach and mudflats along the shore of Tokyo Bay began in 1912, with the construction of Japan's first civilian aerodrome.

Following World War II, the expanding Tokyo Metropolis created a demand for additional factory locations and public housing.

Mihama Ward is largely a regional commercial center and bedroom community for central Chiba and Tokyo.

[1] ÆON, Seiko Instruments and several other companies are headquartered in the Makuhari[citation needed] business district of Mihama-ku.