| 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 junior high
JLPT level N1
2112 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 泌尿器 【ヒニョウキ】 urinary organs
- 泌乳 【ヒツニュウ】 lactation
- 泌尿器 【ヒニョウキ】 urinary organs
- 泌乳 【ヒツニュウ】 lactation
Readings
- Korean:
- bi, pil
Spanish
- rezumar
- secretar
Portuguese
- Esvair-se
- fluxo
- ensopar
- penetrar
- ocultar
French
- suinter
- couler
- absorber
- s'infiltrer
- sécréter
| 1737 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 1846 | A New Dictionary of Kanji Usage |
| 2522 | Classic Nelson (Andrew Nelson) |
| 1787 | Essential Kanji (P.G. O’Neill) |
| 1465 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 1870 | Kanji and Kana (Spahn and Hadamitzky) |
| 2031 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 1492 | Kanji in Context (Nishiguchi and Kono) |
| 1179 | Kodansha Compact Kanji Guide |
| 390 | Kodansha Kanji Dictionary (Jack Halpern) |
| 247 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 294 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 643 | Les Kanjis dans la tete (Yves Maniette) |
| 17279 | Morohashi |
| 332 | New Japanese English Character Dictionary (Jack Halpern) |
| 3092 | New Nelson (John Haig) |
| 636 | Remembering The Kanji (James Heisig) |
| 686 | Remembering The Kanji, 6th edition (James Heisig) |
| 1204 | Tuttle Kanji Cards (Alexander Kask) |
| 359 | 2001 Kanji |
| 3a5.10 | The Kanji Dictionary |
| 1-3-5 | SKIP code |
| 3310.0 | Four corner code |
| 1-40-71 | JIS X 0208-1997 kuten code |
| 6ccc | Unicode hex code |
Jōyō kanji, taught in grade 6
JLPT level N1
862 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 秘 【ヒ】 secret, mystery
- 秘書 【ヒショ】 (private) secretary, treasured book, secret book
- 部外秘 【ブガイヒ】 restricted, confidential
- 社外秘 【シャガイヒ】 company secret
Kun reading compounds
- 秘める 【ひめる】 to hide, to keep to oneself
- 密か 【ひそか】 secret, private, surreptitious
Readings
- Korean:
- bi
Spanish
- secreto
- misterio
- mala evacuación
- esconder
- mantener en secreto
Portuguese
- segredo
- esconder
French
- garder secret
- cacher
| 974 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 964 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 865 | A New Dictionary of Kanji Usage |
| 3281 | Classic Nelson (Andrew Nelson) |
| 940 | Essential Kanji (P.G. O’Neill) |
| 1583 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 1117 | Japanese Names (P.G. O’Neill) |
| 807 | Kanji and Kana (Spahn and Hadamitzky) |
| 824 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 1102 | Kanji in Context (Nishiguchi and Kono) |
| 1436 | Kodansha Compact Kanji Guide |
| 1490 | Kodansha Kanji Dictionary (Jack Halpern) |
| 787 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1074 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 913 | Les Kanjis dans la tete (Yves Maniette) |
| 24977 | Morohashi |
| 1159 | New Japanese English Character Dictionary (Jack Halpern) |
| 4140 | New Nelson (John Haig) |
| 904 | Remembering The Kanji (James Heisig) |
| 970 | Remembering The Kanji, 6th edition (James Heisig) |
| 915 | Tuttle Kanji Cards (Alexander Kask) |
| 2259 | 2001 Kanji |
| 5d5.6 | The Kanji Dictionary |
| 1-5-5 | SKIP code |
| 2390.0 | Four corner code |
| 1-40-75 | JIS X 0208-1997 kuten code |
| 79d8 | Unicode hex code |