圏 JLPT N1 Kanji 圏 — sphere, circle, radius, range JLPT N1 12 strokes Secondary (Jōyō) Radical 囗 #1216 most frequent Physical Properties · Shape Size Readings On'yomiケン Kun'yomiかこ.い Example words 圏けん(1) sphere; circle; range (2) category (only in the context of "category theory")