Topic summary
Windows-31J
Extracted from the Wikipedia article Code page 932 (Microsoft Windows).
Windows-31J is the most used non-UTF-8/Unicode Japanese encoding on the web. However, many people and software packages, including Microsoft libraries, declare the Shift JIS encoding for Windows-31J data, although it includes some additional characters, and some of the existing characters are mapped to Unicode differently. This has led the WHATWG HTML standard to treat the encoding labels shift_jis and windows-31j interchangeably, and use the Windows variant for its "Shift_JIS" encoder and decoder.