CJKV Information Processing, 2nd Edition

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Chapter 3: Character Set Standards

An alternative set of Unicode mapping tables have been developed by Koichi Yasuoka (

 yasuoka kōichi), which do not include these ctitious character set extensions.

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Seemingly Missing Characters

As pointed out earlier in this chapter, Chinese and Korean character sets include the com-

plete set of Japanese kana, specically hiragana and katakana. While this seems to indicate

that Chinese and Korean fonts that are based on these character sets can render arbitrary

Japanese text that includes hiragana and katakana, this is not the case. As an example

of a katakana character that is missing from most Chinese and Korean character sets

that otherwise suggest that they include all Japanese kana characters, take for instance

the Japanese long vowel mark, , which is JIS X 0208:1997 1-28 and maps to Unicode

3. is character is absolutely necessary to properly render arbitrary katakana text.

To less of an extent, JIS X 0208:1997 1-19 through 1-22, which correspond to Unicode

3, 3, 39, and 39, respectively, are also necessary to render hiragana

and katakana text.

Some Chinese character sets have recognized these omissions and have since added these

characters. GBK, which is an extended version of GB 2312-80, added the Japanese long

vowel mark at <96 >. GB 18030-2000 and its 2005 revision, due to their GBK her ...