Kanji are part of the Japanese writing system. Because of the large number of characters, learning them is a major task for those who study Japanese. There are many different techniques and systems for learning kanji.
Japanese schoolchildren learn the characters by repetition. Characters are repeatedly written until memorised. There is a fixed order of characters followed by all elementary schools.
Methods for learners of Japanese vary from similar copying-based methods used by texts such as O'Neill, to the mnemonic-based methods seen in James Heisig's series of books Remembering the Kanji. Several other textbooks have their own unique methods, often based on the etymology of the characters, such as Mathias and Habein's or Henshall's books. Pictorial mnemonics, as in the text Kanji Pict-o-graphix, are also seen.
Learners may be confused about how many characters they need to learn in order to read Japanese fluently. The government-approved list of characters called the jōyō kanji is commonly referred to as a standard.
- from wikipedia