| 1934 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 1414 | A New Dictionary of Kanji Usage |
| 2750 | Classic Nelson (Andrew Nelson) |
| 1726 | Essential Kanji (P.G. O’Neill) |
| 1511 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 1790 | Kanji and Kana (Spahn and Hadamitzky) |
| 1926 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 1802 | Kanji in Context (Nishiguchi and Kono) |
| 1266 | Kodansha Compact Kanji Guide |
| 1079 | Kodansha Kanji Dictionary (Jack Halpern) |
| 583 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 772 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1089 | Les Kanjis dans la tete (Yves Maniette) |
| 18902X | Morohashi |
| 869 | New Japanese English Character Dictionary (Jack Halpern) |
| 3403 | New Nelson (John Haig) |
| 1080 | Remembering The Kanji (James Heisig) |
| 1161 | Remembering The Kanji, 6th edition (James Heisig) |
| 1209 | Tuttle Kanji Cards (Alexander Kask) |
Jōyō kanji, taught in junior high
JLPT level N1
1359 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 炉 【ロ】 hearth, fireplace, furnace, kiln
- 炉心 【ロシン】 nuclear reactor core
- 原子炉 【ゲンシロ】 atomic reactor, nuclear reactor
- 高炉 【コウロ】 blast furnace
Readings
- Korean:
- ro
Spanish
- chimenea
- horno
- fundición
Portuguese
- lareira
- forno
- fornalha
- reator
French
- fournaise
- foyer
- four
- réacteur
| 1160 | 2001 Kanji |
| 4d4.2 | The Kanji Dictionary |
| 1-4-4 | SKIP code |
| 1-1-7 | SKIP code |
| 9387.7 | Four corner code |
| 9382.7 | Four corner code |
| 1-47-07 | JIS X 0208-1997 kuten code |
| 7089 | Unicode hex code |
Jōyō kanji, taught in grade 1
JLPT level N5
574 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 火 【カ】 Tuesday, fire (second of the five elements)
- 火炎瓶 【カエンビン】 Molotov cocktail, petrol bomb, gasoline bomb
- 発火 【ハッカ】 ignition, combustion, catching fire, firing a blank cartridge, discharge of a gun without bullets
- 点火 【テンカ】 ignition, lighting, firing, setting off
Kun reading compounds
- 火 【ひ】 fire, flame, blaze
- 火口 【ひぐち】 burner, nozzle, origin of a fire
- 飛び火 【とびひ】 leaping flames, flying sparks, spread of fire (due to leaping flames), repercussions in unanticipated areas, spilling over, effects of an incident spreading to those seemingly uninvolved, impetigo contagiosa
- 不知火 【しらぬい】 phosphorescent light, mysterious lights on the sea, sea fire
Readings
- Korean:
- hwa
Spanish
- fuego
- flama
- llama
Portuguese
- fogo
French
- feu
| 13 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 15 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 8 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 432 | A New Dictionary of Kanji Usage |
| 2743 | Classic Nelson (Andrew Nelson) |
| 15 | Essential Kanji (P.G. O’Neill) |
| 69 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 52 | Japanese Names (P.G. O’Neill) |
| 1.A | Japanese for Busy People |
| 20 | Kanji and Kana (Spahn and Hadamitzky) |
| 20 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 18 | Kanji in Context (Nishiguchi and Kono) |
| 1260 | Kodansha Compact Kanji Guide |
| 4273 | Kodansha Kanji Dictionary (Jack Halpern) |
| 2159 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 2911 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 163 | Les Kanjis dans la tete (Yves Maniette) |
| 18850 | Morohashi |
| 3463 | New Japanese English Character Dictionary (Jack Halpern) |
| 3394 | New Nelson (John Haig) |
| 161 | Remembering The Kanji (James Heisig) |
| 173 | Remembering The Kanji, 6th edition (James Heisig) |
| 27 | Tuttle Kanji Cards (Alexander Kask) |
| 1162 | 2001 Kanji |
| 4d0.1 | The Kanji Dictionary |
| 4-4-4 | SKIP code |
| 1-1-3 | SKIP code |
| 9080.0 | Four corner code |
| 1-18-48 | JIS X 0208-1997 kuten code |
| 706b | Unicode hex code |