| 500 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 600 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 572 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 134 | A New Dictionary of Kanji Usage |
| 17 | Classic Nelson (Andrew Nelson) |
| 130 | Essential Kanji (P.G. O’Neill) |
| 104 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 94 | Japanese Names (P.G. O’Neill) |
| 3.18 | Japanese for Busy People |
| 94 | Kanji and Kana (Spahn and Hadamitzky) |
| 94 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 422 | Kanji in Context (Nishiguchi and Kono) |
| 10 | Kodansha Compact Kanji Guide |
| 4242 | Kodansha Kanji Dictionary (Jack Halpern) |
| 2141 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 2890 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1225 | Les Kanjis dans la tete (Yves Maniette) |
| 19 | Morohashi |
| 3434 | New Japanese English Character Dictionary (Jack Halpern) |
| 13 | New Nelson (John Haig) |
| 1217 | Remembering The Kanji (James Heisig) |
| 1302 | Remembering The Kanji, 6th edition (James Heisig) |
| 103 | The Kanji Way to Japanese Language Power (Dale Crowley) |
| 444 | Tuttle Kanji Cards (Alexander Kask) |
Jōyō kanji, taught in grade 4
JLPT level N4
101 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 不 【フ】 un-, non-
- 不安 【フアン】 anxiety, uneasiness, worry, apprehension, fear, insecurity, suspense
- 意味不 【イミフ】 of uncertain meaning, ambiguous, cryptic, nonsensical, incomprehensible, perplexing
- 社不 【シャフ】 person unfit for society, misfit
- 無 【ブ】 un-, non-, bad ..., poor ...
- 不気味 【ブキミ】 weird, eerie, ominous, creepy, uncanny, unearthly
Readings
- Korean:
- bu, bul
Spanish
- prefijo negativo: in-
- des-
Portuguese
- Prefixo negativo
- negativa
- não
- feia
- ruim
- deselegante
French
- négation
- non
- mauvais
- laid
- maladroit
| 3154 | 2001 Kanji |
| 0a4.2 | The Kanji Dictionary |
| 4-4-1 | SKIP code |
| 3-3-1 | SKIP code |
| 3-2-2 | SKIP code |
| 1090.0 | Four corner code |
| 1-41-52 | JIS X 0208-1997 kuten code |
| 4e0d | Unicode hex code |
Jōyō kanji, taught in grade 5
JLPT level N3
252 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 確 【カク】 certain, definite
- 確執 【カクシツ】 discord, antagonism
- 当確 【トウカク】 projected to win, sure to be elected, home free
- 精確 【セイカク】 detailed and accurate, exhaustive and precise, meticulous, finely detailed
Kun reading compounds
- 確か 【たしか】 sure, certain, positive, definite, reliable, trustworthy, safe, sound, firm, accurate, correct, exact, If I'm not mistaken, If I remember correctly, If I remember rightly
- 確かめる 【たしかめる】 to make sure, to check, to ascertain, to confirm, to verify
- 確かめる 【たしかめる】 to make sure, to check, to ascertain, to confirm, to verify
Readings
- Korean:
- hwag
Spanish
- seguro
- cierto
- genuino
- capaz
- asegurarse
- afirmar
Portuguese
- garantia
- firme
- sólido
- duradouro
- apertado
- confirmar
- limpar
- evidente
French
- certitude
- confirmation
- sûr
- solide
- clair
- évident
| 570 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 664 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 634 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 395 | A New Dictionary of Kanji Usage |
| 3217 | Classic Nelson (Andrew Nelson) |
| 661 | Essential Kanji (P.G. O’Neill) |
| 767 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 2305 | Japanese Names (P.G. O’Neill) |
| 603 | Kanji and Kana (Spahn and Hadamitzky) |
| 613 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 803 | Kanji in Context (Nishiguchi and Kono) |
| 1409 | Kodansha Compact Kanji Guide |
| 1571 | Kodansha Kanji Dictionary (Jack Halpern) |
| 830 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1135 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 574 | Les Kanjis dans la tete (Yves Maniette) |
| 24366 | Morohashi |
| 1228 | New Japanese English Character Dictionary (Jack Halpern) |
| 4039 | New Nelson (John Haig) |
| 567 | Remembering The Kanji (James Heisig) |
| 609 | Remembering The Kanji, 6th edition (James Heisig) |
| 343 | The Kanji Way to Japanese Language Power (Dale Crowley) |
| 805 | Tuttle Kanji Cards (Alexander Kask) |
| 3375 | 2001 Kanji |
| 5a10.3 | The Kanji Dictionary |
| 1-5-10 | SKIP code |
| 1461.4 | Four corner code |
| 1-19-46 | JIS X 0208-1997 kuten code |
| 78ba | Unicode hex code |