12 strokes
open, unfold, unseal
Jōyō kanji, taught in grade 3
JLPT level N4
59 of 2500 most used kanji in newspapers


Stroke order

On reading compounds

  • 開花 【カイカ】 flowering, blooming, blossoming, coming into bloom, flowering (of a civilization, talent, etc.), blossoming, blooming, bearing fruit (of efforts)
  • 開演 【カイエン】 curtain raising, starting (e.g. play, concert)
  • 疎開 【ソカイ】 evacuation (to the country), spreading out (troops), deployment, dispersal
  • 非公開 【ヒコウカイ】 private, non-public, secret, closed-door, closed

Kun reading compounds

  • 開く 【ひらく】 to open, to undo, to unseal, to unpack, to bloom, to unfold, to spread out, to open (for business, e.g. in the morning), to be wide (gap, etc.), to widen, to hold (meeting, party, etc.), to give, to open, to found (nation, dynasty, sect, etc.), to open (a new business), to set up, to establish, to start, to open (ports, borders, etc.), to open (an account), to open up (new land, path, etc.), to clear, to develop, to open (a file, etc.), to extract (root), to reduce (equation), to cut open (fish), to change (kanji into hiragana), to flare (e.g. skirt), to slacken (into a poor posture)
  • 開き 【ひらき】 opening, gap, dried and opened fish
  • 開き直る 【ひらきなおる】 to become defiant, to fight back, to turn upon, to take the offensive
  • 開ける 【ひらける】 to open out (of a view, scenery, etc.), to spread out, to become clear (of a road, visibility, etc.), to open up, to improve (of luck, prospects, etc.), to get better, to develop (of a town, civilization, etc.), to become civilized, to modernize, to grow, to advance (of knowledge, ideas, etc.), to be sensible, to be understanding, to be enlightened, to open (of a new road, railway, etc.), to be opened to traffic, to become populous, to become densely built, to become bustling
  • 開く 【あく】 to open (e.g. doors), to open (e.g. business, etc.), to be empty, to be vacant, to be available, to be free, to be open (e.g. neckline, etc.), to have been opened (of one's eyes, mouth, etc.), to come to an end, to open (one's eyes, mouth, etc.), to have a hole, to form a gap, to have an interval (between events)
  • 開ける 【あける】 to open (a door, etc.), to unwrap (e.g. parcel, package), to unlock, to open (for business, etc.), to empty, to remove, to make space, to make room, to move out, to clear out, to be away from (e.g. one's house), to leave (temporarily), to dawn, to grow light, to end (of a period, season), to begin (of the New Year), to leave (one's schedule) open, to make time (for), to make (a hole), to open up (a hole)


Japanese names:
はる、 か、 ひらき
Mandarin Chinese (pinyin):


  • abrir
  • desdoblar
  • dar comienzo
  • abrirse
  • estar abierto


  • abrir
  • desdobrar
  • deslacrar


  • ouvrir
  • s'ouvrir
  • briser le sceau
171 A Guide To Reading and Writing Japanese (Florence Sakade)
261 A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot)
241 A Guide To Remembering Japanese Characters (Kenneth G. Henshall)
80 A New Dictionary of Kanji Usage
4950 Classic Nelson (Andrew Nelson)
550 Essential Kanji (P.G. O’Neill)
270 Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki)
1821 Japanese Names (P.G. O’Neill)
2.13 Japanese for Busy People
396 Kanji and Kana (Spahn and Hadamitzky)
400 Kanji and Kana, 2nd Edition (Spahn and Hadamitzky)
215 Kanji in Context (Nishiguchi and Kono)
1840 Kodansha Compact Kanji Guide
4121 Kodansha Kanji Dictionary (Jack Halpern)
2092 Kodansha Kanji Learner’s Dictionary (Jack Halpern)
2835 Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern)
1636 Les Kanjis dans la tete (Yves Maniette)
41233 Morohashi
3321 New Japanese English Character Dictionary (Jack Halpern)
6393 New Nelson (John Haig)
1622 Remembering The Kanji (James Heisig)
1750 Remembering The Kanji, 6th edition (James Heisig)
290 The Kanji Way to Japanese Language Power (Dale Crowley)
391 Tuttle Kanji Cards (Alexander Kask)
3855 2001 Kanji
8e4.6 The Kanji Dictionary
3-8-4 SKIP code
7744.1 Four corner code
1-19-11 JIS X 0208-1997 kuten code
958b Unicode hex code