| 1245 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 1853 | A New Dictionary of Kanji Usage |
| 1063 | Classic Nelson (Andrew Nelson) |
| 1524 | Essential Kanji (P.G. O’Neill) |
| 1148 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 1613 | Kanji and Kana (Spahn and Hadamitzky) |
| 1721 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 1928 | Kanji in Context (Nishiguchi and Kono) |
| 369 | Kodansha Compact Kanji Guide |
| 277 | Kodansha Kanji Dictionary (Jack Halpern) |
| 174 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 208 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 312 | Les Kanjis dans la tete (Yves Maniette) |
| 4932 | Morohashi |
| 236 | New Japanese English Character Dictionary (Jack Halpern) |
| 987 | New Nelson (John Haig) |
| 306 | Remembering The Kanji (James Heisig) |
| 328 | Remembering The Kanji, 6th edition (James Heisig) |
| 1108 | Tuttle Kanji Cards (Alexander Kask) |
pit, hole
- On:
- コウ
Jōyō kanji, taught in junior high
JLPT level N1
2040 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 坑 【コウ】 pit (esp. of a mine)
- 坑口 【コウコウ】 pithead, minehead
- 廃坑 【ハイコウ】 closure of a mine, abandoned mine, disused mine
- 開坑 【カイコウ】 opening of mine
Readings
- Korean:
- gaeng
Spanish
- hoyo
- agujero
- caverna
- mina
Portuguese
- buraco
- furo
French
- mine
- fosse
- trou
| 1457 | 2001 Kanji |
| 3b4.6 | The Kanji Dictionary |
| 1-3-4 | SKIP code |
| 4011.7 | Four corner code |
| 1-25-03 | JIS X 0208-1997 kuten code |
| 5751 | Unicode hex code |
Jōyō kanji, taught in grade 4
JLPT level N1
339 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 井 【セイ】 well curb, Chinese "Well" constellation (one of the 28 mansions)
- 整然 【セイゼン】 orderly, regular, systematic, well-organized, well-organised, trim, tidy, accurate
- 市井 【シセイ】 the street, the town
- 整々 【セイセイ】 well-ordered, in good order, orderly
Kun reading compounds
- 井 【い】 well
- 堰 【せき】 dam, weir, barrier, sluice
- 筒井 【つつい】 round well
- 市井 【しせい】 the street, the town
Readings
- Japanese names:
- いの、 さい、 ひ
- Korean:
- jeong
Spanish
- pozo
- ciudad
Portuguese
- poço
French
- puits
- margelle
- ville
- communauté
| 1470 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 252 | A New Dictionary of Kanji Usage |
| 165 | Classic Nelson (Andrew Nelson) |
| 916 | Essential Kanji (P.G. O’Neill) |
| 1031 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 103 | Japanese Names (P.G. O’Neill) |
| 1193 | Kanji and Kana (Spahn and Hadamitzky) |
| 1255 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 1064 | Kanji in Context (Nishiguchi and Kono) |
| 34 | Kodansha Compact Kanji Guide |
| 4265 | Kodansha Kanji Dictionary (Jack Halpern) |
| 2153 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 2905 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1824 | Les Kanjis dans la tete (Yves Maniette) |
| 258 | Morohashi |
| 3454 | New Japanese English Character Dictionary (Jack Halpern) |
| 76 | New Nelson (John Haig) |
| 1806 | Remembering The Kanji (James Heisig) |
| 1946 | Remembering The Kanji, 6th edition (James Heisig) |
| 1019 | Tuttle Kanji Cards (Alexander Kask) |
| 1955 | 2001 Kanji |
| 0a4.46 | The Kanji Dictionary |
| 4-4-3 | SKIP code |
| 5500.0 | Four corner code |
| 1-16-70 | JIS X 0208-1997 kuten code |
| 4e95 | Unicode hex code |