| 333 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 239 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 220 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 95 | A New Dictionary of Kanji Usage |
| 2942 | Classic Nelson (Andrew Nelson) |
| 104 | Essential Kanji (P.G. O’Neill) |
| 217 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 1361 | Japanese Names (P.G. O’Neill) |
| 3.17 | Japanese for Busy People |
| 143 | Kanji and Kana (Spahn and Hadamitzky) |
| 143 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 241 | Kanji in Context (Nishiguchi and Kono) |
| 1321 | Kodansha Compact Kanji Guide |
| 1220 | Kodansha Kanji Dictionary (Jack Halpern) |
| 659 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 881 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 271 | Les Kanjis dans la tete (Yves Maniette) |
| 21014 | Morohashi |
| 970 | New Japanese English Character Dictionary (Jack Halpern) |
| 3644 | New Nelson (John Haig) |
| 265 | Remembering The Kanji (James Heisig) |
| 283 | Remembering The Kanji, 6th edition (James Heisig) |
| 59 | The Kanji Way to Japanese Language Power (Dale Crowley) |
| 212 | Tuttle Kanji Cards (Alexander Kask) |
Jōyō kanji, taught in grade 2
JLPT level N4
86 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 理 【リ】 reason, principle, logic, general principle (as opposed to individual concrete phenomenon), the underlying principles of the cosmos (in neo-Confucianism)
- 理科 【リカ】 science (inc. mathematics, medicine, etc.), natural science, science department (university), science course, science (as a school subject)
- 合理 【ゴウリ】 rationality
- 経理 【ケイリ】 accounting, administration (of money)
Kun reading compounds
- 理 【ことわり】 reason, logic, sense, natural way of things
Readings
- Japanese names:
- あや、 おさむ、 さと、 さとる、 ただ、 ただし、 とおる、 に、 のり、 ひ、 まこと、 まさ、 まさし、 まろ、 みち、 よし
- Korean:
- ri
Spanish
- lógica
- razón
- preparar
Portuguese
- lógica
- arranjo
- razão
- justiça
- verdade
French
- logique
- principe
- raison
- justice
- vérité
| 3172 | 2001 Kanji |
| 4f7.1 | The Kanji Dictionary |
| 1-4-7 | SKIP code |
| 1611.4 | Four corner code |
| 1-45-93 | JIS X 0208-1997 kuten code |
| 7406 | Unicode hex code |
Jōyō kanji, taught in grade 3
JLPT level N4
336 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 研究員 【ケンキュウイン】 researcher, lab worker
- 研究 【ケンキュウ】 study, research, investigation
- 予研 【ヨケン】 National Institute of Health
- 技研 【ギケン】 technical research institute
Kun reading compounds
- 研ぐ 【とぐ】 to sharpen, to hone, to whet, to grind, to wash (rice), to scour, to polish, to burnish
Readings
- Japanese names:
- のり
- Korean:
- yeon
Spanish
- estudio
- afilar
- pulir
Portuguese
- polir
- estudar
- afiar
French
- polir
- étudier
- aiguiser
| 204 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 290 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 272 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 426 | A New Dictionary of Kanji Usage |
| 3180 | Classic Nelson (Andrew Nelson) |
| 583 | Essential Kanji (P.G. O’Neill) |
| 231 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 875 | Japanese Names (P.G. O’Neill) |
| 2.8 | Japanese for Busy People |
| 896 | Kanji and Kana (Spahn and Hadamitzky) |
| 918 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 297 | Kanji in Context (Nishiguchi and Kono) |
| 1398 | Kodansha Compact Kanji Guide |
| 1456 | Kodansha Kanji Dictionary (Jack Halpern) |
| 771 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1046 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 682 | Les Kanjis dans la tete (Yves Maniette) |
| 24080 | Morohashi |
| 1132 | New Japanese English Character Dictionary (Jack Halpern) |
| 3991 | New Nelson (John Haig) |
| 675 | Remembering The Kanji (James Heisig) |
| 729 | Remembering The Kanji, 6th edition (James Heisig) |
| 284 | The Kanji Way to Japanese Language Power (Dale Crowley) |
| 325 | Tuttle Kanji Cards (Alexander Kask) |
| 3355 | 2001 Kanji |
| 5a4.1 | The Kanji Dictionary |
| 1-5-4 | SKIP code |
| 1164.0 | Four corner code |
| 1-24-06 | JIS X 0208-1997 kuten code |
| 7814 | Unicode hex code |