| 2 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 2 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 61 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 6 | A New Dictionary of Kanji Usage |
| 273 | Classic Nelson (Andrew Nelson) |
| 2 | Essential Kanji (P.G. O’Neill) |
| 9 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 4 | Japanese Names (P.G. O’Neill) |
| 1.A | Japanese for Busy People |
| 3 | Kanji and Kana (Spahn and Hadamitzky) |
| 3 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 2 | Kanji in Context (Nishiguchi and Kono) |
| 31 | Kodansha Compact Kanji Guide |
| 2421 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1224 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1688 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 2 | Les Kanjis dans la tete (Yves Maniette) |
| 247 | Morohashi |
| 1922 | New Japanese English Character Dictionary (Jack Halpern) |
| 72 | New Nelson (John Haig) |
| 2 | Remembering The Kanji (James Heisig) |
| 2 | Remembering The Kanji, 6th edition (James Heisig) |
| 11 | The Kanji Way to Japanese Language Power (Dale Crowley) |
| 2 | Tuttle Kanji Cards (Alexander Kask) |
Jōyō kanji, taught in grade 1
JLPT level N5
9 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 二 【ニ】 two, 2
- 二院 【ニイン】 the two houses of legislature
- 一二 【イチニ】 the first and second, a few
- 十二 【ジュウニ】 twelve, 12, queen
- 次男 【ジナン】 second son
- 二黒 【ジコク】 second of nine traditional astrological signs (corresponding to Saturn and southwest)
- 不二 【フジ】 being two sides of the same coin, being the same (while appearing different), Very sincerely yours, peerless, unparalleled, unparallelled
- 唯一不二 【ユイイツフジ】 one and only, unique
Kun reading compounds
- 二 【に】 two, 2
- 二重 【にじゅう】 double, two-fold, two layers, duplex, diplo-, dipl-, double-edged eyelid, double eyelid, creased eyelid
- 二つ 【ふたつ】 two
- 二つ目 【ふたつめ】 one after next, second
- 再び 【ふたたび】 again, once more, a second time
Readings
- Japanese names:
- おと、 つぐ、 つぎ、 にい、 は、 ふ、 ふたつ、 ふだ、 わ
- Korean:
- i
Spanish
- dos
- 2
Portuguese
- dois
French
- deux
- radical deux (no. 2)
| 3072 | 2001 Kanji |
| 0a2.1 | The Kanji Dictionary |
| 2-1-1 | SKIP code |
| 1010.0 | Four corner code |
| 1-38-83 | JIS X 0208-1997 kuten code |
| 4e8c | Unicode hex code |
Jōyō kanji, taught in grade 6
JLPT level N1
1366 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 穴 【ケツ】 ass, arse, buttocks, rear, end, acupuncture point, hole, notch
- 穴隙 【ケツゲキ】 crevice, aperture
- 横穴 【ヨコアナ】 cave, tunnel, tunnel tomb (Kofun period)
- 経穴 【ケイケツ】 acupuncture point
Kun reading compounds
- 穴 【あな】 hole, opening, orifice, perforation, pit, hollow, cavity, hole (e.g. in the ground), burrow, den, lair, holt, hole, deficit, shortage, (financial) hole, loss, gap (left by a missing employee, team member, etc.), vacancy, opening, flaw, fault, defect, weak point, hole (in a theory, plan, etc.), loophole, good place not many people know about, well-kept secret, upset victory (with a large payoff), long shot, dark horse, (partitioned) box (type of floor seating in a traditional Japanese theatre), hiding place, hideout
- 穴埋め 【あなうめ】 filling (up) a hole, filling in (for a gap, vacancy, etc.), stopgap, filler (e.g. article), making up (for a loss, damage, etc.), covering (a deficit), compensation, cloze deletion (test format)
- 風穴 【かざあな】 air hole, windhole, ventilator
- 横穴 【よこあな】 cave, tunnel, tunnel tomb (Kofun period)
Readings
- Japanese names:
- けな、 しし、 な
- Korean:
- hyeol
Spanish
- agujero
- hueco
- cueva
- lugar poco conocido
- lugar escondido
Portuguese
- buraco
- orifício
- brecha
- caverna
- gruta
French
- trou
- orifice
- fente
- grotte
- tanière
| 860 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 849 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 1201 | A New Dictionary of Kanji Usage |
| 3313 | Classic Nelson (Andrew Nelson) |
| 984 | Essential Kanji (P.G. O’Neill) |
| 1595 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 158 | Japanese Names (P.G. O’Neill) |
| 899 | Kanji and Kana (Spahn and Hadamitzky) |
| 921 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 1122 | Kanji in Context (Nishiguchi and Kono) |
| 1450 | Kodansha Compact Kanji Guide |
| 2682 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1366 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1852 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1326 | Les Kanjis dans la tete (Yves Maniette) |
| 25406 | Morohashi |
| 2159 | New Japanese English Character Dictionary (Jack Halpern) |
| 4187 | New Nelson (John Haig) |
| 1316 | Remembering The Kanji (James Heisig) |
| 1413 | Remembering The Kanji, 6th edition (James Heisig) |
| 834 | Tuttle Kanji Cards (Alexander Kask) |
| 762 | 2001 Kanji |
| 3m2.2 | The Kanji Dictionary |
| 2-3-2 | SKIP code |
| 3080.2 | Four corner code |
| 1-23-74 | JIS X 0208-1997 kuten code |
| 7a74 | Unicode hex code |