Jōyō kanji, Taught in junior high
JLPT level: N1
1216 of 2500 most used kanji in newspapers
Stroke count: 12
Meaning: sphere, circle, radius, range
Kunyomi: かこ.い
Onyomi: ケン
Composition: 囗 巻
Radical: 囗
Meaning: enclosure
Reading: くにがまえ
Frequency: 118
圏 （ケン） sphere, circle, range, area, zone, bloc, category
圏内 （ケンナイ） inside (a region, area, etc.), within the range (of), within the sphere (of influence, etc.)
成層圏 （セイソウケン） stratosphere
勢力圏 （セイリョクケン） sphere of influence