JIS X 0213

The full name of the standard is 7-bit and 8-bit double byte coded extended KANJI sets for information interchange (7ビット及び8ビットの2バイト情報交換用符号化拡張漢字集合, Nana-Bitto Oyobi Hachi-Bitto no Ni-Baito Jōhō Kōkan'yō Fugōka Kakuchō Kanji Shūgō).

Plane 1 is a superset of JIS X 0208 containing kanji sets level 1 to 3 and non-kanji characters such as Hiragana, Katakana (including letters used to write the Ainu language), Latin, Greek and Cyrillic alphabets, digits, symbols and so on.

Also, it defines the mapping from each of these encodings to ISO/IEC 10646 (Unicode) for each character.

Because about 300 kanji are in Unicode Plane 2, Unicode implementations supporting only the Basic Multilingual Plane cannot handle all of the JIS X 0213 characters.

The 2004 edition of JIS X 0213 changed the recommended renderings of 168 kanji.