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Kanji Information Sheet for 開  ( PDF version of this Kanji PDF version )

stroke order illustration  
English:
open
unfold
unseal
On-Yomi:
カイ
Kun-Yomi:
ひら.く
ひら.き
-びら.き
ひら.ける
あ.く
あ.ける
はる
Bushu (Radical) Info: 門 (もん) – gate
Henshall Mnemonic: hands remove bar and open gate
Levels: JLPT N4 | JLPT 3 (old) | Grade 3
Frequency: #59 of the 2500 most used kanji in newspapers

Common Words and/or Phrases Using this Kanji:

Click any individual kanji to view a similar information sheet for it.
Click [K] to look up the word's individual character(s) at WWWJDIC.
Click [D] to look up the word at WWWJDIC (definition is the same but other useful features exist).

Click [Jisho] to look up the word at Jisho.org.

JLPT N5 Words

  • く   [あく]
    (v5k,vi) (1) to open; to become open; to become empty   [K] [D] [Jisho]
  • ける   [あける]
    (v1) to open   [K] [D] [Jisho]

JLPT N4 Words

  • く   [ひらく]
    (v5k,vt) to open (e.g. a bank-account, festival, etc.)   [K] [D] [Jisho]

JLPT N3 Words

  •   [かいし]
    (n,vs) start; commencement; beginning   [K] [D] [Jisho]

JLPT N2 Words

  •   [かいかい]
    (n) opening of a meeting   [K] [D] [Jisho]
  •   [かいつう]
    (n,vs) opening; open   [K] [D] [Jisho]
  •   [かいほう]
    (n,vs) open; throw open; liberalization   [K] [D] [Jisho]
  •   [てんかい]
    (n,vs) develop; expansion (opposite of compression)   [K] [D] [Jisho]

JLPT N1 Words

  •   [かいさい]
    (n,vs) holding a meeting; open an exhibition   [K] [D] [Jisho]
  •   [かいたく]
    (n,vs) reclamation (of wasteland); cultivation; pioneer   [K] [D] [Jisho]
  •   [かいはつ]
    (n) development; exploitation   [K] [D] [Jisho]
  •   [こうかい]
    (n,vs) presenting to the public   [K] [D] [Jisho]
  •   [だかい]
    (n) break in the deadlock   [K] [D] [Jisho]
  •   [みかい]
    (adj-na,adj-no,n) savage land; backward region; uncivilized   [K] [D] [Jisho]

Other Popular Words Not Classified by JLPT

  •   [うちゅうかいはつ]
    space development   [K] [D] [Jisho]
  •   [うちゅうかいはつじぎょうだん]
    NASDA; National Space Development Agency   [K] [D] [Jisho]
  •   [おきなわかいはつちょうちょうかん]
    Director General of Okinawa Development Agency   [K] [D] [Jisho]
  • き   [ひらき]
    (n) (1) opening; gap; (2) (suff) dried and opened fish   [K] [D] [Jisho]
  • る   [ひらきなおる]
    (v5r) to become defiant; to turn upon; to become serious   [K] [D] [Jisho]
  • ける   [ひらける]
    (v1) to become civilized; to become opened up; be up-to-date   [K] [D] [Jisho]
  •   [かいえん]
    (n) curtain raising; starting (e.g. play, concert)   [K] [D] [Jisho]
  •   [かいか]
    (n,vs) blooming   [K] [D] [Jisho]
  •   [かいかん]
    (n) opening of new hall   [K] [D] [Jisho]
  •   [かいぎょう]
    (n) opening of business or practice   [K] [D] [Jisho]
  •   [かいぎょうい]
    (n) medical practitioner   [K] [D] [Jisho]
  •   [かいきょく]
    (n) opening of post-office or telephone exchange   [K] [D] [Jisho]
  •   [かいこう]
    (n) open mouth   [K] [D] [Jisho]
  •   [かいこう]
    (n) opening a school   [K] [D] [Jisho]
  •   [かいこう]
    (n) open port; opening a port   [K] [D] [Jisho]
  •   [かいこく]
    (n,vs) opening of a country (e.g. Japan) to the world   [K] [D] [Jisho]
  •   [かいこん]
    (n,vs) cultivating new land   [K] [D] [Jisho]
  •   [かいじ]
    (n) disclosure (legal)   [K] [D] [Jisho]
  •   [かいじょう]
    (n) capitulation (of fort)   [K] [D] [Jisho]
  •   [かいじょう]
    (n,vs) opening   [K] [D] [Jisho]
  •   [かいせつ]
    (n,vs) establishment; opening   [K] [D] [Jisho]
  •   [かいせん]
    (n,vs) outbreak of war; starting a war   [K] [D] [Jisho]
  •   [かいたくしゃ]
    (n) pioneer; settler; colonist   [K] [D] [Jisho]
  •   [かいてい]
    (n) court session; trial   [K] [D] [Jisho]
  •   [かいてん]
    (n,vs) (grand) opening of shop   [K] [D] [Jisho]
Find more details for at jisho.org, Yookoso! or WWWJDIC

Acknowledgments

The sofware used to generate this kanji information uses the EDICT and KANJIDIC files. These files are the property of the Electronic Dictionary Research and Development Group at Monash University and are used in conformance with the Group's license.

NOTE: I converted the sources just mentioned years ago and have never really updated so there may be some missing or incorrect information that has been addressed in the original sources but not here.

The first Stroke Order image used on this page is courtesy of Ulrich Apel's excellent open source KanjiVG project. The second image is from the folks at the excellent Jisho Japanese-English dictionary site and it too is based on KanjiVG.

Classifying the kanji and popular vocabulary by the new JLPT levels was done by consulting Jonathan Waller‘s JLPT Resources page, renshuu, Wictionary, and Nihongo Ichiban.

The Henshall Mnemonics are the copyright of Tuttle Publishing and are the result of the hard work by Professor Henshall. See the list I used here.

If you are curious about the lexicography shown in the word definitions, visit the WWWJDIC abbreviations and codes guide and the JMdict/Edict Lexicographical details page.