圏 - sphere, circle, radius

stratosphere

inside (a region, area, etc.); within the range (of); within the sphere (of influence, etc.)

Arctic Circle; the Arctic

outside (a region, area, etc.); out of range (of a mobile network, radar, etc.); outside the sphere (of influence, etc.); out of contention; out of reach

Greater Tokyo Metropolitan area

urban area; metropolitan area; metropolitan region

German-speaking countries; German language sphere

tropopause

traffic area; traffic block

Greater China (incl. Hong Kong, Macao, Taiwan and sometimes Singapore); Sinosphere

economic bloc

circle of fifths