| 550 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 644 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 615 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 690 | A New Dictionary of Kanji Usage |
| 130 | Classic Nelson (Andrew Nelson) |
| 560 | Essential Kanji (P.G. O’Neill) |
| 663 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 149 | Japanese Names (P.G. O’Neill) |
| 1207 | Kanji and Kana (Spahn and Hadamitzky) |
| 1270 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 1096 | Kanji in Context (Nishiguchi and Kono) |
| 1152 | Kodansha Compact Kanji Guide |
| 2436 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1230 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1695 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 134 | Les Kanjis dans la tete (Yves Maniette) |
| 17088 | Morohashi |
| 1937 | New Japanese English Character Dictionary (Jack Halpern) |
| 3031 | New Nelson (John Haig) |
| 132 | Remembering The Kanji (James Heisig) |
| 139 | Remembering The Kanji, 6th edition (James Heisig) |
| 646 | Tuttle Kanji Cards (Alexander Kask) |
Jōyō kanji, taught in grade 5
JLPT level N2
846 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 永久 【エイキュウ】 eternity, permanence, perpetuity, Eikyū era (1113.7.13-1118.4.3)
- 永遠 【エイエン】 eternity, perpetuity, permanence, immortality
- 永々 【エイエイ】 forever
- 大永 【タイエイ】 Taiei era (1521.8.23-1528.8.20)
Kun reading compounds
- 長い 【ながい】 long (distance, length), long (time), protracted, prolonged
- 長いこと 【ながいこと】 for a long time
Readings
- Japanese names:
- え、 と、 のり、 ひさ、 ひさし
- Korean:
- yeong
Spanish
- eterno
- infinito
- perpetuo
- largo
- prolongado
Portuguese
- eternidade
- ambicionar
French
- éternité
- long
- permanent
| 342 | 2001 Kanji |
| 3a1.1 | The Kanji Dictionary |
| 2-1-4 | SKIP code |
| 4-5-4 | SKIP code |
| 3023.2 | Four corner code |
| 1-17-42 | JIS X 0208-1997 kuten code |
| 6c38 | Unicode hex code |
Jōyō kanji, taught in grade 5
JLPT level N2
688 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 旧痾 【キュウア】 persistent disease
- 久安 【キュウアン】 Kyūan era (1145.7.22-1151.1.26)
- 恒久 【コウキュウ】 permanence, perpetuity
- 耐久 【タイキュウ】 endurance, persistence
- 久留子 【クルス】 cross sign
- 久遠 【クオン】 eternity
- 上手く行く 【ウマクイク】 to go smoothly, to turn out well, to do the trick, to have peaceful relations
- 阿摩美久 【アマミキヨ】 Amamikyu (Ryukyuan religion creation goddess)
Kun reading compounds
- 久しい 【ひさしい】 long (time that has passed), old (story)
Readings
- Japanese names:
- きゅ、 わ、 なが、 ひさ、 ひさし
- Korean:
- gu
Spanish
- mucho tiempo
- largo tiempo
- largo
- continuado por mucho tiempo
Portuguese
- tempo longo
- estória antiga
French
- longtemps
- vieille histoire
| 582 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 676 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 647 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 591 | A New Dictionary of Kanji Usage |
| 153 | Classic Nelson (Andrew Nelson) |
| 704 | Essential Kanji (P.G. O’Neill) |
| 289 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 45 | Japanese Names (P.G. O’Neill) |
| 1210 | Kanji and Kana (Spahn and Hadamitzky) |
| 1273 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 1097 | Kanji in Context (Nishiguchi and Kono) |
| 20 | Kodansha Compact Kanji Guide |
| 4191 | Kodansha Kanji Dictionary (Jack Halpern) |
| 2121 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 2867 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1025 | Les Kanjis dans la tete (Yves Maniette) |
| 118 | Morohashi |
| 3384 | New Japanese English Character Dictionary (Jack Halpern) |
| 47 | New Nelson (John Haig) |
| 1016 | Remembering The Kanji (James Heisig) |
| 1092 | Remembering The Kanji, 6th edition (James Heisig) |
| 641 | Tuttle Kanji Cards (Alexander Kask) |
| 2562 | 2001 Kanji |
| 0a3.7 | The Kanji Dictionary |
| 4-3-1 | SKIP code |
| 4-3-4 | SKIP code |
| 2780.0 | Four corner code |
| 1-21-55 | JIS X 0208-1997 kuten code |
| 4e45 | Unicode hex code |
Jōyō kanji, taught in grade 3
JLPT level N3
1106 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 歯 【シ】 tooth, age, years
- 歯科 【シカ】 dentistry
- 義歯 【ギシ】 artificial tooth
- 生歯 【セイシ】 teething, cutting teeth, dentition
Kun reading compounds
- 齢 【よわい】 (one's) age
- 歯する 【よわいする】 to associate (with), to join the company of, to stand alongside (as an equal)
- 歯 【は】 tooth, teeth, tooth (of a comb, saw, etc.), cog, support (of a geta)
- 歯切れ 【はぎれ】 feel when biting, manner of enunciation
- 継ぎ歯 【つぎば】 capped tooth, (dental) crown
- 年端 【としは】 age, years (old)
- 齢 【よわい】 (one's) age
- 歯する 【よわいする】 to associate (with), to join the company of, to stand alongside (as an equal)
- 歯する 【よわいする】 to associate (with), to join the company of, to stand alongside (as an equal)
Readings
- Korean:
- chi
Spanish
- diente
- diente de engranaje
Portuguese
- dentes
- dentes de engrenagens
French
- dent
- dentée (roue)
- crémaillère (rail)
| 414 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 306 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 290 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 997 | A New Dictionary of Kanji Usage |
| 5428 | Classic Nelson (Andrew Nelson) |
| 439 | Essential Kanji (P.G. O’Neill) |
| 652 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 2051 | Japanese Names (P.G. O’Neill) |
| 478 | Kanji and Kana (Spahn and Hadamitzky) |
| 486 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 702 | Kanji in Context (Nishiguchi and Kono) |
| 1942 | Kodansha Compact Kanji Guide |
| 3124 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1603 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 2185 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1179 | Les Kanjis dans la tete (Yves Maniette) |
| 16323 | Morohashi |
| 2476 | New Japanese English Character Dictionary (Jack Halpern) |
| 2961 | New Nelson (John Haig) |
| 1171 | Remembering The Kanji (James Heisig) |
| 1255 | Remembering The Kanji, 6th edition (James Heisig) |
| 398 | Tuttle Kanji Cards (Alexander Kask) |
| 1275 | 2001 Kanji |
| 6b6.11 | The Kanji Dictionary |
| 2-4-8 | SKIP code |
| 2177.2 | Four corner code |
| 1-27-85 | JIS X 0208-1997 kuten code |
| 6b6f | Unicode hex code |