In the past, the Dongmen Police Station was situated near the Jingshan Gate of the Jhuluo City in the Qing Dynasty era, an area that flourished with commercial and economic development at the time. It was also close to the famous attraction, the “Reflection of Ten Thousand Mountains,” a bustling area during the late Qing Dynasty. In the early Japanese colonial period, as the political center shifted from south to north and the economic focus moved from east to west, the surrounding areas of the East Gate District gradually developed into a “yukaku” district.

Yukaku was a concentration of “kashi-zashiki” businesses, akin to today's red-light district, housing officially recognized brothels, attracting many stationed soldiers and workers, and bustling with commercial and entertainment activities.

In the mid-Japanese rule, the Dongmen Police Station was strategically located near the “Reflection of Ten Thousand Mountains” and the yukaku district, presumably for convenient management of areas known for entertainment and dense population. Its geographical location symbolizes the development process of urban Chiayi and the functional role of police surveillance and security in the Japanese colonial era.