| 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) | 
      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)
 
| 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 |