| 1899 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 1110 | A New Dictionary of Kanji Usage |
| 5440 | Classic Nelson (Andrew Nelson) |
| 1992 | Essential Kanji (P.G. O’Neill) |
| 1600 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 1199 | Japanese Names (P.G. O’Neill) |
| 1758 | Kanji and Kana (Spahn and Hadamitzky) |
| 1886 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 1867 | Kanji in Context (Nishiguchi and Kono) |
| 1930 | Kodansha Compact Kanji Guide |
| 2603 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1332 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1805 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 542 | Les Kanjis dans la tete (Yves Maniette) |
| 25751 | Morohashi |
| 2099 | New Japanese English Character Dictionary (Jack Halpern) |
| 4232 | New Nelson (John Haig) |
| 536 | Remembering The Kanji (James Heisig) |
| 575 | Remembering The Kanji, 6th edition (James Heisig) |
| 1406 | Tuttle Kanji Cards (Alexander Kask) |
Jōyō kanji, taught in junior high
JLPT level N1
1195 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 竜 【リュウ】 dragon (esp. a Chinese dragon), naga, semi-divine human-cobra chimera in Hindu and Buddhist mythology, promoted rook
- 竜王 【リュウオウ】 Dragon King, promoted rook
- 鎧竜 【ガイリュウ】 ankylosaur (any dinosaur of infraorder Ankylosauria)
- 青龍 【セイリョウ】 blue dragon (an auspicious creature in Chinese mythology), Azure Dragon (god said to rule over the eastern heavens)
- 竜 【リュウ】 dragon (esp. a Chinese dragon), naga, semi-divine human-cobra chimera in Hindu and Buddhist mythology, promoted rook
- 竜駕 【リョウガ】 imperial carriage
- 青龍 【セイリョウ】 blue dragon (an auspicious creature in Chinese mythology), Azure Dragon (god said to rule over the eastern heavens)
- 蛟竜 【コウリョウ】 mizuchi, aquatic, dragon-like beast with four feet, horns and poisonous breath, unfulfilled genius, dormant talent
Kun reading compounds
- 竜 【りゅう】 dragon (esp. a Chinese dragon), naga, semi-divine human-cobra chimera in Hindu and Buddhist mythology, promoted rook
- 竜巻 【たつまき】 tornado, whirlwind, waterspout, twister
- 伊勢海老 【いせえび】 spiny lobster (esp. Japanese spiny lobster, Panulirus japonicus)
Readings
- Japanese names:
- りう
- Korean:
- ryong, nong
Spanish
- dragón
Portuguese
- dragão imperial
French
- dragon
- impérial
| 456 | 2001 Kanji |
| 5b5.3 | The Kanji Dictionary |
| 2-2-8 | SKIP code |
| 2-5-5 | SKIP code |
| 0071.6 | Four corner code |
| 1-46-21 | JIS X 0208-1997 kuten code |
| 7adc | Unicode hex code |
Jōyō kanji, taught in grade 1
JLPT level N4
284 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 口 【ク】 mouth, speech, counter for people or implements
- 口径 【コウケイ】 aperture, bore, calibre, caliber
- 開口 【カイコウ】 opening, aperture (e.g. camera), opening one's mouth, beginning to speak, open, broad
- 経口 【ケイコウ】 taken by mouth, oral
- 口 【ク】 mouth, speech, counter for people or implements
- 口 【クチ】 mouth, opening, hole, gap, orifice, mouth (of a bottle), spout, nozzle, mouthpiece, gate, door, entrance, exit, speaking, speech, talk (i.e. gossip), taste, palate, mouth (to feed), opening (i.e. vacancy), available position, invitation, summons, kind, sort, type, opening (i.e. beginning), counter for mouthfuls, shares (of money), stove burners, and swords
- 猪口 【チョコ】 sake cup, small deep porcelain bowl for serving food
- 赤口 【シャッコウ】 day that is unlucky except between the auspicious hours of 11am and 1pm (in the traditional calendar)
Kun reading compounds
- 口 【くち】 mouth, opening, hole, gap, orifice, mouth (of a bottle), spout, nozzle, mouthpiece, gate, door, entrance, exit, speaking, speech, talk (i.e. gossip), taste, palate, mouth (to feed), opening (i.e. vacancy), available position, invitation, summons, kind, sort, type, opening (i.e. beginning), counter for mouthfuls, shares (of money), stove burners, and swords
- 口利き 【くちきき】 mediation, good offices, intervention, mediator, middleman, influential person, person of influence, eloquence, eloquent person, way of speaking
- 切り口 【きりくち】 cut end, section, opening, slit, point of view, (different) perspective, new approach
- 大口 【おおぐち】 big mouth, mouth opened wide, boastful speech, tall talk, bragging, boasting, large amount, large quantity
Readings
- Korean:
- gu
Spanish
- boca
- orificio
- apertura
Portuguese
- boca
French
- bouche
| 27 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 34 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 20 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 213 | A New Dictionary of Kanji Usage |
| 868 | Classic Nelson (Andrew Nelson) |
| 38 | Essential Kanji (P.G. O’Neill) |
| 31 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 29 | Japanese Names (P.G. O’Neill) |
| 2.16 | Japanese for Busy People |
| 54 | Kanji and Kana (Spahn and Hadamitzky) |
| 54 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 167 | Kanji in Context (Nishiguchi and Kono) |
| 276 | Kodansha Compact Kanji Guide |
| 4189 | Kodansha Kanji Dictionary (Jack Halpern) |
| 2119 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 2865 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 11 | Les Kanjis dans la tete (Yves Maniette) |
| 3227 | Morohashi |
| 3382 | New Japanese English Character Dictionary (Jack Halpern) |
| 685 | New Nelson (John Haig) |
| 11 | Remembering The Kanji (James Heisig) |
| 11 | Remembering The Kanji, 6th edition (James Heisig) |
| 200 | The Kanji Way to Japanese Language Power (Dale Crowley) |
| 16 | Tuttle Kanji Cards (Alexander Kask) |
| 3777 | 2001 Kanji |
| 3d0.1 | The Kanji Dictionary |
| 4-3-1 | SKIP code |
| 3-3-0 | SKIP code |
| 6000.0 | Four corner code |
| 1-24-93 | JIS X 0208-1997 kuten code |
| 53e3 | Unicode hex code |