| 1 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 1 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 1 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 4 | A New Dictionary of Kanji Usage |
| 1 | Classic Nelson (Andrew Nelson) |
| 1 | Essential Kanji (P.G. O’Neill) |
| 1 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 3 | Japanese Names (P.G. O’Neill) |
| 1.A | Japanese for Busy People |
| 2 | Kanji and Kana (Spahn and Hadamitzky) |
| 2 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 1 | Kanji in Context (Nishiguchi and Kono) |
| 1 | Kodansha Compact Kanji Guide |
| 4148 | Kodansha Kanji Dictionary (Jack Halpern) |
| 2105 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 2850 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1 | Les Kanjis dans la tete (Yves Maniette) |
| 1 | Morohashi |
| 3341 | New Japanese English Character Dictionary (Jack Halpern) |
| 1 | New Nelson (John Haig) |
| 1 | Remembering The Kanji (James Heisig) |
| 1 | Remembering The Kanji, 6th edition (James Heisig) |
| 1 | The Kanji Way to Japanese Language Power (Dale Crowley) |
| 1 | Tuttle Kanji Cards (Alexander Kask) |
Jōyō kanji, taught in grade 1
JLPT level N5
2 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 一 【イチ】 one, 1, best, first, foremost, beginning, start, a (single), one (of many), ace, bottom string (on a shamisen, etc.)
- 一位 【イチイ】 first place, first rank, units position (of a number)
- 十一 【ジュウイチ】 eleven, 11, jack
- １対１ 【イチタイイチ】 one-to-one, one-on-one
- 一 【イツ】 one, same (mind, path, etc.)
- 一に 【イツニ】 solely, entirely, only, or
- 均一 【キンイツ】 uniformity, equality
- 画一 【カクイツ】 uniformity, standardization, standardisation
Kun reading compounds
- 一つ 【ひとつ】 one, for one thing, only, (not) even, just (e.g. "just try it"), some kind of, one type of
- 一つ一つ 【ひとつひとつ】 one-by-one, separately, in detail
Readings
- Japanese names:
- かず、 い、 いっ、 いる、 かつ、 かづ、 てん、 はじめ、 ひ、 ひとつ、 まこと
- Korean:
- il
Spanish
- uno
- 1
Portuguese
- um
French
- un
- radical un (no. 1)
| 3072 | 2001 Kanji |
| 0a1.1 | The Kanji Dictionary |
| 4-1-4 | SKIP code |
| 1000.0 | Four corner code |
| 1-16-76 | JIS X 0208-1997 kuten code |
| 4e00 | Unicode hex code |
hundred million, 10**8
- On:
- オク
Jōyō kanji, taught in grade 4
JLPT level N2
716 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 億 【オク】 hundred million, 100,000,000, 10^8
- 億万 【オクマン】 millions and millions
- 十億 【ジュウオク】 1,000,000,000, billion
- １００億 【ヒャクオク】 10,000,000,000, ten billion
Readings
- Japanese names:
- お
- Korean:
- eog
Spanish
- cien millones
- 10 elevado a 8
Portuguese
- cem milhões
- 10 elevado a 8
French
- cent millions
- 10**8
| 557 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 452 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 430 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 389 | A New Dictionary of Kanji Usage |
| 551 | Classic Nelson (Andrew Nelson) |
| 868 | Essential Kanji (P.G. O’Neill) |
| 335 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 2252 | Japanese Names (P.G. O’Neill) |
| 382 | Kanji and Kana (Spahn and Hadamitzky) |
| 383 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 650 | Kanji in Context (Nishiguchi and Kono) |
| 136 | Kodansha Compact Kanji Guide |
| 192 | Kodansha Kanji Dictionary (Jack Halpern) |
| 125 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 148 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 992 | Les Kanjis dans la tete (Yves Maniette) |
| 1178 | Morohashi |
| 170 | New Japanese English Character Dictionary (Jack Halpern) |
| 321 | New Nelson (John Haig) |
| 983 | Remembering The Kanji (James Heisig) |
| 1058 | Remembering The Kanji, 6th edition (James Heisig) |
| 462 | The Kanji Way to Japanese Language Power (Dale Crowley) |
| 622 | Tuttle Kanji Cards (Alexander Kask) |
| 2158 | 2001 Kanji |
| 2a13.6 | The Kanji Dictionary |
| 1-2-13 | SKIP code |
| 2023.6 | Four corner code |
| 1-18-15 | JIS X 0208-1997 kuten code |
| 5104 | Unicode hex code |