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JIS X 0212

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JIS X 0212

JIS X 0212 is a Japanese Industrial Standard defining a coded character set for encoding supplementary characters for use in Japanese. This standard is intended to supplement JIS X 0208 (Code page 952). It is numbered 953 or 5049 as an IBM code page (see below).

It is one of the source standards for Unicode's CJK Unified Ideographs.

In 1990 the Japanese Standards Association (JSA) released a supplementary character set standard: JIS X 0212-1990 Code of the Supplementary Japanese Graphic Character Set for Information Interchange (情報交換用漢字符号-補助漢字, Jōhō Kōkan'yō Kanji Fugō - Hojo Kanji). This standard was intended to build upon the range of characters available in the main JIS X 0208 character set, and to address shortcomings in the coverage of that set.

The standard specified 6,067 characters, comprising:

The following encodings or encapsulations are used to enable JIS X 0212 characters to be used in files, etc.

No encapsulation of JIS X 0212 characters in the popular Shift JIS encoding is possible, as Shift JIS does not have sufficient unallocated code space for the characters.

JIS X 0212 is called Code page 953 by IBM, which includes vendor extensions. The alternative CCSID 5049 excludes these extensions.

As JIS X 0212 characters cannot be encoded in Shift JIS, the coding system which has traditionally dominated Japanese information processing, few practical implementations of the character set have taken place. As mentioned above, it can be encoded in EUC-JP, which is commonly used in Unix/Linux systems, and it is here that most implementations have occurred:

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