啓 JLPT N1 Kanji 啓 — disclose, open, say JLPT N1 11 strokes Secondary (Jōyō) Radical 口 #1403 most frequent Readings On'yomiケイ Kun'yomiひら.くさと.す Example words 拝啓はいけいDear (so and so); Dear Sir; Dear Madam; To Whom It May Concern