| 3 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 3 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 23 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 10 | A New Dictionary of Kanji Usage |
| 8 | Classic Nelson (Andrew Nelson) |
| 3 | Essential Kanji (P.G. O’Neill) |
| 4 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 22 | Japanese Names (P.G. O’Neill) |
| 1.A | Japanese for Busy People |
| 4 | Kanji and Kana (Spahn and Hadamitzky) |
| 4 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 3 | Kanji in Context (Nishiguchi and Kono) |
| 5 | Kodansha Compact Kanji Guide |
| 2423 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1225 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1689 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 3 | Les Kanjis dans la tete (Yves Maniette) |
| 12 | Morohashi |
| 1924 | New Japanese English Character Dictionary (Jack Halpern) |
| 8 | New Nelson (John Haig) |
| 3 | Remembering The Kanji (James Heisig) |
| 3 | Remembering The Kanji, 6th edition (James Heisig) |
| 21 | The Kanji Way to Japanese Language Power (Dale Crowley) |
| 10 | Tuttle Kanji Cards (Alexander Kask) |
Jōyō kanji, taught in grade 1
JLPT level N5
14 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 三 【サン】 three, 3
- 三 【サン】 three
- 十三 【ジュウサン】 thirteen, 13, king
- 七三 【シチサン】 7 or 3 ratio, hair parted on one side
- 四三 【シソウ】 one four-of-a-kind and one three-of-a-kind in a dealt hand, three and a four (in dice games)
Kun reading compounds
- 三 【さん】 three, 3
- 三十日 【みそか】 last day of the month
- 三つ 【みっつ】 three, three years of age
- 三つ折り 【みつおり】 threefold, folded in three
- 三つ 【みっつ】 three, three years of age
- ３つの密 【みっつのみつ】 three Cs, three conditions that facilitate the transmission of infectious diseases (closed spaces, crowds, and close contact)
Readings
- Japanese names:
- か、 さ、 さい、 さえ、 さぶ、 ざ、 ざえ、 ざぶ、 そう、 ぞ、 ただ、 みつ、 みん、 も、 や
- Korean:
- sam
Spanish
- tres
- 3
Portuguese
- três
French
- trois
| 3072 | 2001 Kanji |
| 0a3.1 | The Kanji Dictionary |
| 2-1-2 | SKIP code |
| 1010.1 | Four corner code |
| 1-27-16 | JIS X 0208-1997 kuten code |
| 4e09 | Unicode hex code |
Jōyō kanji, taught in grade 5
JLPT level N1
1218 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 酸 【サン】 acid, sourness, sour taste
- 酸化 【サンカ】 oxidation, oxidization
- 炭酸 【タンサン】 carbonic acid, carbonated water, carbonated drink, baking soda, sodium carbonate
- アミノ酸 【アミノサン】 amino acid
Kun reading compounds
- 酸い 【すい】 sour, acid
- 酸葉 【すいば】 sorrel (Rumex acetosa), Common sorrel, garden sorrel, spinach dock
Readings
- Korean:
- san
Spanish
- ácido
- agrio
Portuguese
- ácido
- amargo
- azedo
- picante
French
- acide
- aigre
- amer
- sur (goût)
| 618 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 715 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 689 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 1027 | A New Dictionary of Kanji Usage |
| 4789 | Classic Nelson (Andrew Nelson) |
| 819 | Essential Kanji (P.G. O’Neill) |
| 1838 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 516 | Kanji and Kana (Spahn and Hadamitzky) |
| 525 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 1420 | Kanji in Context (Nishiguchi and Kono) |
| 1797 | Kodansha Compact Kanji Guide |
| 1968 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1049 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1415 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1449 | Les Kanjis dans la tete (Yves Maniette) |
| 39871 | Morohashi |
| 1563 | New Japanese English Character Dictionary (Jack Halpern) |
| 6177 | New Nelson (John Haig) |
| 1437 | Remembering The Kanji (James Heisig) |
| 1545 | Remembering The Kanji, 6th edition (James Heisig) |
| 791 | Tuttle Kanji Cards (Alexander Kask) |
| 3267 | 2001 Kanji |
| 7e7.2 | The Kanji Dictionary |
| 1-7-7 | SKIP code |
| 1364.7 | Four corner code |
| 1-27-32 | JIS X 0208-1997 kuten code |
| 9178 | Unicode hex code |