| 497 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 597 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 568 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 292 | A New Dictionary of Kanji Usage |
| 129 | Classic Nelson (Andrew Nelson) |
| 281 | Essential Kanji (P.G. O’Neill) |
| 526 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 120 | Japanese Names (P.G. O’Neill) |
| 3.16 | Japanese for Busy People |
| 520 | Kanji and Kana (Spahn and Hadamitzky) |
| 529 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 423 | Kanji in Context (Nishiguchi and Kono) |
| 767 | Kodansha Compact Kanji Guide |
| 15 | Kodansha Kanji Dictionary (Jack Halpern) |
| 6 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 6 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 642 | Les Kanjis dans la tete (Yves Maniette) |
| 10299 | Morohashi |
| 15 | New Japanese English Character Dictionary (Jack Halpern) |
| 1781 | New Nelson (John Haig) |
| 635 | Remembering The Kanji (James Heisig) |
| 685 | Remembering The Kanji, 6th edition (James Heisig) |
| 188 | The Kanji Way to Japanese Language Power (Dale Crowley) |
| 453 | Tuttle Kanji Cards (Alexander Kask) |
Jōyō kanji, taught in grade 4
JLPT level N3
265 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 必 【ヒツ】 definiteness, certainty
- 必需 【ヒツジュ】 necessary
Kun reading compounds
- 必ず 【かならず】 always, without exception, necessarily, certainly, without fail, positively, invariably
- 必ずしも 【かならずしも】 (not) always, (not) necessarily, (not) entirely, (not) all
Readings
- Korean:
- pil
Spanish
- sin falta
- necesariamente
- inevitable
- ciertamente
Portuguese
- invariavelmente
- inevitável
- certo
French
- nécessairement
- certain
- inévitable
- invariablement
| 359 | 2001 Kanji |
| 0a5.16 | The Kanji Dictionary |
| 1-1-4 | SKIP code |
| 4-5-4 | SKIP code |
| 3300.0 | Four corner code |
| 1-41-12 | JIS X 0208-1997 kuten code |
| 5fc5 | Unicode hex code |
Jōyō kanji, taught in grade 5
JLPT level N1
603 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 修業 【シュウギョウ】 pursuit of knowledge, studying, learning, training, completing a course
- 修学旅行 【シュウガクリョコウ】 excursion, field trip, school trip
- 監修 【カンシュウ】 (editorial) supervision, general editorship, supervising director
- 改修 【カイシュウ】 repair, improvement
- 修業 【シュウギョウ】 pursuit of knowledge, studying, learning, training, completing a course
- 修学旅行 【シュウガクリョコウ】 excursion, field trip, school trip
- 逆修 【ギャクシュ】 holding a memorial service for oneself, an older person conducting a memorial service for a deceased, younger person
Kun reading compounds
- 修める 【おさめる】 to study, to complete (a course), to cultivate, to master, to order (one's life), to repair (a fault one has committed)
- 修まる 【おさまる】 to reform (oneself), to conduct oneself well
Readings
- Japanese names:
- おき、 なが、 のぶ、 おさむ
- Korean:
- su
Spanish
- disciplina
- reparación
- arreglo
- dominar
- controlar
- controlarse
Portuguese
- disciplina
- estudo
- mestre
French
- discipline
- bien se conduire
- étudier
- maîtriser
| 633 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 730 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 704 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 644 | A New Dictionary of Kanji Usage |
| 491 | Classic Nelson (Andrew Nelson) |
| 563 | Essential Kanji (P.G. O’Neill) |
| 321 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 1038 | Japanese Names (P.G. O’Neill) |
| 945 | Kanji and Kana (Spahn and Hadamitzky) |
| 975 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 1175 | Kanji in Context (Nishiguchi and Kono) |
| 107 | Kodansha Compact Kanji Guide |
| 138 | Kodansha Kanji Dictionary (Jack Halpern) |
| 92 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 105 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1738 | Les Kanjis dans la tete (Yves Maniette) |
| 721 | Morohashi |
| 123 | New Japanese English Character Dictionary (Jack Halpern) |
| 260 | New Nelson (John Haig) |
| 1722 | Remembering The Kanji (James Heisig) |
| 1858 | Remembering The Kanji, 6th edition (James Heisig) |
| 715 | Tuttle Kanji Cards (Alexander Kask) |
| 2160 | 2001 Kanji |
| 2a8.11 | The Kanji Dictionary |
| 1-2-8 | SKIP code |
| 1-3-7 | SKIP code |
| 2822.2 | Four corner code |
| 2722.2 | Four corner code |
| 1-29-04 | JIS X 0208-1997 kuten code |
| 4fee | Unicode hex code |