Perl 5 version 32.0 documentation



Encode::JP - Japanese Encodings


  1. use Encode qw/encode decode/;
  2. $euc_jp = encode("euc-jp", $utf8); # loads Encode::JP implicitly
  3. $utf8 = decode("euc-jp", $euc_jp); # ditto


This module implements Japanese charset encodings. Encodings supported are as follows.

  1. Canonical Alias Description
  2. --------------------------------------------------------------------
  3. euc-jp /\beuc.*jp$/i EUC (Extended Unix Character)
  4. /\bjp.*euc/i
  5. /\bujis$/i
  6. shiftjis /\bshift.*jis$/i Shift JIS (aka MS Kanji)
  7. /\bsjis$/i
  8. 7bit-jis /\bjis$/i 7bit JIS
  9. iso-2022-jp ISO-2022-JP [RFC1468]
  10. = 7bit JIS with all Halfwidth Kana
  11. converted to Fullwidth
  12. iso-2022-jp-1 ISO-2022-JP-1 [RFC2237]
  13. = ISO-2022-JP with JIS X 0212-1990
  14. support. See below
  15. MacJapanese Shift JIS + Apple vendor mappings
  16. cp932 /\bwindows-31j$/i Code Page 932
  17. = Shift JIS + MS/IBM vendor mappings
  18. jis0201-raw JIS0201, raw format
  19. jis0208-raw JIS0201, raw format
  20. jis0212-raw JIS0201, raw format
  21. --------------------------------------------------------------------


To find out how to use this module in detail, see Encode.

Note on ISO-2022-JP(-1)?

ISO-2022-JP-1 (RFC2237) is a superset of ISO-2022-JP (RFC1468) which adds support for JIS X 0212-1990. That means you can use the same code to decode to utf8 but not vice versa.

  1. $utf8 = decode('iso-2022-jp-1', $stream);


  1. $utf8 = decode('iso-2022-jp', $stream);

yield the same result but

  1. $with_0212 = encode('iso-2022-jp-1', $utf8);

is now different from

  1. $without_0212 = encode('iso-2022-jp', $utf8 );

In the latter case, characters that map to 0212 are first converted to U+3013 (0xA2AE in EUC-JP; a white square also known as 'Tofu' or 'geta mark') then fed to the decoding engine. U+FFFD is not used, in order to preserve text layout as much as possible.


The ASCII region (0x00-0x7f) is preserved for all encodings, even though this conflicts with mappings by the Unicode Consortium.