| 729 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 623 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 593 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 117 | A New Dictionary of Kanji Usage |
| 4274 | Classic Nelson (Andrew Nelson) |
| 262 | Essential Kanji (P.G. O’Neill) |
| 887 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 1218 | Japanese Names (P.G. O’Neill) |
| 3.16 | Japanese for Busy People |
| 419 | Kanji and Kana (Spahn and Hadamitzky) |
| 425 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 424 | Kanji in Context (Nishiguchi and Kono) |
| 1639 | Kodansha Compact Kanji Guide |
| 3263 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1683 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 2290 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1618 | Les Kanjis dans la tete (Yves Maniette) |
| 34768P | Morohashi |
| 2635 | New Japanese English Character Dictionary (Jack Halpern) |
| 5515 | New Nelson (John Haig) |
| 1604 | Remembering The Kanji (James Heisig) |
| 1730 | Remembering The Kanji, 6th edition (James Heisig) |
| 78 | The Kanji Way to Japanese Language Power (Dale Crowley) |
| 536 | Tuttle Kanji Cards (Alexander Kask) |
Jōyō kanji, taught in grade 4
JLPT level N3
106 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 要 【ヨウ】 main point, essential point, important thing, necessity, need, requirement
- 要因 【ヨウイン】 main cause, primary factor
- 所要 【ショヨウ】 required, needed, necessary
- 法要 【ホウヨウ】 Buddhist memorial service
Kun reading compounds
- 要る 【いる】 to be needed, to be necessary, to be required, to be wanted, to need, to want
- 要 【かなめ】 pivot, vital point, cornerstone, keystone, Japanese photinia
- 要石 【かなめいし】 keystone
Readings
- Japanese names:
- とし
- Korean:
- yo
Spanish
- necesidad
- punto central
- esencia
- necesitar
Portuguese
- necessidade
- ponto principal
- essência
- pivô
- chave para
French
- besoin
- point principal
- pivot
- essentiel
- point clef
| 3269 | 2001 Kanji |
| 3e6.11 | The Kanji Dictionary |
| 2-6-3 | SKIP code |
| 1040.4 | Four corner code |
| 1-45-55 | JIS X 0208-1997 kuten code |
| 8981 | Unicode hex code |
Jōyō kanji, taught in grade 4
JLPT level N3
94 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 約 【ヤク】 approximately, about, promise, appointment, engagement, shortening, reduction, simplification, contraction (in phonetics)
- 約束 【ヤクソク】 promise, agreement, arrangement, one's word, contract, pact, appointment, engagement, date, convention, rule, destiny, fate
- 締約 【テイヤク】 conclusion of a treaty
- 成約 【セイヤク】 conclusion of a contract
Kun reading compounds
- 約まる 【つづまる】 to compress, to shrink
- 約める 【つづめる】 to abridge, to shorten, to economize
- 約やか 【つづまやか】 concise, brief, humble, frugal, modest, discrete
Readings
- Korean:
- yag, yo
Spanish
- promesa
- aproximadamente
- encogerse
- economizar
Portuguese
- promessa
- aproximadamente
- recuar
French
- environ
- promettre
- abréger
- raccourcir
| 726 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 621 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 591 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 137 | A New Dictionary of Kanji Usage |
| 3499 | Classic Nelson (Andrew Nelson) |
| 451 | Essential Kanji (P.G. O’Neill) |
| 808 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 2.12 | Japanese for Busy People |
| 211 | Kanji and Kana (Spahn and Hadamitzky) |
| 211 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 381 | Kanji in Context (Nishiguchi and Kono) |
| 1516 | Kodansha Compact Kanji Guide |
| 1632 | Kodansha Kanji Dictionary (Jack Halpern) |
| 860 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1177 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1374 | Les Kanjis dans la tete (Yves Maniette) |
| 27242X | Morohashi |
| 1280 | New Japanese English Character Dictionary (Jack Halpern) |
| 4440 | New Nelson (John Haig) |
| 1362 | Remembering The Kanji (James Heisig) |
| 1462 | Remembering The Kanji, 6th edition (James Heisig) |
| 258 | The Kanji Way to Japanese Language Power (Dale Crowley) |
| 534 | Tuttle Kanji Cards (Alexander Kask) |
| 2752 | 2001 Kanji |
| 6a3.7 | The Kanji Dictionary |
| 1-6-3 | SKIP code |
| 2792.0 | Four corner code |
| 1-44-83 | JIS X 0208-1997 kuten code |
| 7d04 | Unicode hex code |