You are viewing the version of this documentation from Perl 5.8.0. View the latest version



Encode::JP - Japanese Encodings


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


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

  Canonical   Alias		Description
  euc-jp      /\beuc.*jp$/i	EUC (Extended Unix Character)
  shiftjis    /\bshift.*jis$/i	Shift JIS (aka MS Kanji)
  7bit-jis    /\bjis$/i		7bit JIS
  iso-2022-jp			ISO-2022-JP                  [RFC1468]
				= 7bit JIS with all Halfwidth Kana 
				  converted to Fullwidth
  iso-2022-jp-1			ISO-2022-JP-1                [RFC2237]
                                = ISO-2022-JP with JIS X 0212-1990
				  support.  See below
  MacJapanese	                Shift JIS + Apple vendor mappings
  cp932                         Code Page 932	
                                = Shift JIS + MS/IBM vendor mappings
  jis0201-raw                   JIS0201, raw format
  jis0208-raw                   JIS0201, raw format
  jis0212-raw                   JIS0201, raw format


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.

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


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

yield the same result but

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

is now different from

$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. See

to find out why it is implemented that way.