noun
urbanization promotion area
A legal term under Japan's City Planning Act; an area designated for priority urban development, contrasted with 市街化調整区域 (urbanization control area).
See also: 市街化調整区域
この土地は市街化区域に指定されているため、住宅を建てやすい。
Because this land is designated as an urbanization promotion area, it is easy to build a house.