圏 sphere, circle, radius, range 12 strokes jōyō, taught in secondary school old JLPT 1 #1216 in newspapers Readings Onケン Kunかこ.い In Chinese 圈 Words written with it 首都圏 しゅとけん Greater Tokyo Metropolitan area 圏内 けんない inside (a region, area, etc.) 北極圏 ほっきょくけん Arctic Circle 成層圏 せいそうけん stratosphere 圏 けん sphere N1 圏外 けんがい outside (a region, area, etc.) 勢力圏 せいりょくけん sphere of influence