Kanji: 開

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JLPT Level:	JLPT N4 (upper beginner level)
Kanken Level:	Kanken Level 8 (completion of 3rd grade)
Grade:	Taught during the 3rd grade in Japan
Radical:	門 Radical name: もん
Meaning:	Open, unfold, unseal
Usage:	Appears very frequently in Japanese newspapers; only about 60 kanji are used more often.

JLPT Level	Word	Meaning
N5	開(あ)く	to open, to become open
N5	開(あ)ける	to open
N4	開(ひら)く	to open an event
N3	開始(かいし)	start, commencement, beginning
N2	開会(かいかい)	opening of a meeting
N2	開通(かいつう)	opening, open
N2	開放(かいほう)	open, throw open, liberalization
N2	展開(てんかい)	develop, expansion (opposite of compression)
N1	開催(かいさい)	holding a meeting, open an exhibition
N1	開拓(かいたく)	reclamation (of wasteland), cultivation, pioneer
N1	開発(かいはつ)	development, exploitation
N1	公開(こうかい)	presenting to the public
N1	切開(せっかい)	clearing (land), opening up, cutting through
N1	打開(だかい)	break in the deadlock
N1	未開(みかい)	savage land, backward region, uncivilized