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

stroke order illustration  

Bushu (Radical) Info: 穴 (あな) – hole; slit
Henshall Mnemonic: work to open hole in roof to see empty sky
Levels: JLPT N4 | JLPT 4 (old) | Grade 1
Frequency: #304 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

JLPT N5 Words

  •   [そら]
    (n) sky; the heavens   [K] [D] [Jisho]

JLPT N4 Words

  • く   [あく]
    (v5k,vi) (1) to open; to become open; to become empty; (2) to be less crowded   [K] [D] [Jisho]
  •   [くうき]
    (n) air; atmosphere   [K] [D] [Jisho]
  •   [くうこう]
    (n) airport   [K] [D] [Jisho]

JLPT N3 Words

  •   [から]
    (n) emptiness   [K] [D] [Jisho]
  • き   [あき]
    (n) room; time to spare; emptiness; vacant   [K] [D] [Jisho]
  • く   [すく]
    (v5k,vi) (1) to open; to become open; to become empty; (2) to be less crowded   [K] [D] [Jisho]
  •   [こうくう]
    (n) aviation; flying   [K] [D] [Jisho]

JLPT N2 Words

  •   [かくう]
    (adj-na,adj-no,n) aerial; overhead; fiction; fanciful   [K] [D] [Jisho]
  • っぽ   [からっぽ]
    (adj-na,n) empty; vacant; hollow   [K] [D] [Jisho]
  •   [くうそう]
    (n) daydream; fantasy; fancy; vision   [K] [D] [Jisho]
  •   [くうちゅう]
    (n) sky; air   [K] [D] [Jisho]
  •   [しんくう]
    (adj-na,n) vacuum; hollow; empty   [K] [D] [Jisho]

JLPT N1 Words

  • しい   [むなしい]
    (adj) vacant; futile; vain; void; empty; ineffective; lifeless   [K] [D] [Jisho]
  •   [くうかん]
    (n) space; room; airspace   [K] [D] [Jisho]
  •   [くうふく]
    (adj-na,n) hunger   [K] [D] [Jisho]
  •   [じょうくう]
    (n) sky; the skies; high-altitude sky; upper air   [K] [D] [Jisho]
  •   [おおぞら]
    (n) heaven; firmament; the sky   [K] [D] [Jisho]

Other Popular Words Not Classified by JLPT

  •   [うちゅうくうかん]
    the void of space   [K] [D] [Jisho]
  •   [こくう]
    (n) empty space; empty sky   [K] [D] [Jisho]
  •   [あきや]
    (n) vacant or unoccupied house   [K] [D] [Jisho]
  •   [あきかん]
    (n) empty can   [K] [D] [Jisho]
  •   [あきす]
    (n) (1) prowler; sneak thief; cat burglar; (2) empty nest   [K] [D] [Jisho]
  •   [あきち]
    (n) vacant land   [K] [D] [Jisho]
  • ける   [あける]
    (v1,vt) to empty   [K] [D] [Jisho]
  •   [くういき]
    (n) airspace   [K] [D] [Jisho]
  •   [くうきょ]
    (adj-na,n) emptiness; vacancy   [K] [D] [Jisho]
  •   [くうぐん]
    (n) Air Force   [K] [D] [Jisho]
  •   [くうしゃ]
    (n) empty conveyance; free taxi   [K] [D] [Jisho]
  •   [からて]
    (n) karate   [K] [D] [Jisho]
  •   [くうしゅう]
    (n) air-raid   [K] [D] [Jisho]
  • り   [からぶり]
    (n,vs) striking (at something) and missing; in vain   [K] [D] [Jisho]
  •   [くうせき]
    (n) vacancy; vacant seat; room   [K] [D] [Jisho]
  •   [くうぜん]
    (adj-no,n) unprecedented; record-breaking   [K] [D] [Jisho]
  •   [くうそ]
    (adj-na,n) vain; groundless; futile   [K] [D] [Jisho]
  •   [あきち]
    (n) vacant land   [K] [D] [Jisho]
  • 調   [くうちょう]
    (n) (abbr) air conditioning   [K] [D] [Jisho]
  •   [くうてん]
    (n) racing (an engine)   [K] [D] [Jisho]
  •   [くうどう]
    (n) cave; hollow; cavity   [K] [D] [Jisho]
  •   [くうはく]
    (adj-na,n) blank space; vacuum; space; null (NUL)   [K] [D] [Jisho]
  •   [くうばく]
    (n) aerial bombing   [K] [D] [Jisho]
  •   [くうぼ]
    (n) aircraft carrier   [K] [D] [Jisho]
  •   [くうほう]
    (n) blank shot or cartridge; blank ammunition   [K] [D] [Jisho]
Find more details for at, Yookoso! or WWWJDIC


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.