Moriguchi is a city located in Osaka Prefecture, Japan. As of 31 December 2021, the city had an estimated population of 142,655 in 73353 households and a population density of 11,000 persons per km2. The total area of the city is 12.71 square kilometres (4.91 sq mi).

Osaka Prefecture is a prefecture of Japan located in the Kansai region of Honshu. Osaka Prefecture has a population of 8,778,035 and has a geographic area of 1,905 square kilometres (736 sq mi). Osaka Prefecture borders Hyōgo Prefecture to the northwest, Kyoto Prefecture to the north, Nara Prefecture to the southeast, and Wakayama Prefecture to the south.