Shift JIS
| MIME / IANA | Shift_JIS |
|---|---|
| Alias(es) | MS_Kanji, PCK |
| Language(s) | Primarily Japanese, but also supporting English, Russian, Bulgarian, Greek |
| Standard | JIS X 0208:1997 Appendix 1 |
| Classification | Extended ISO 646, variable-width encoding, CJK encoding |
| Extends | JIS X 0201 8-bit format |
| Transforms / Encodes | JIS X 0208 |
| Succeeded by | Shift_JIS-2004 (JIS) Windows-31J (web) |
Shift JIS (also SJIS, MIME name Shift_JIS, known as PCK in Solaris contexts) is a character encoding for the Japanese language, originally developed by the Japanese company ASCII Corporation in conjunction with Microsoft and standardized as JIS X 0208 Appendix 1.
Shift JIS is based on character sets defined within JIS standards JIS X 0201:1997 (for the single-byte characters) and JIS X 0208:1997 (for the double-byte characters).
As of January 2025, less than 0.05% of surveyed web pages used Shift JIS (actually decoded as its superset Windows-31J encoding), a decline from 1.3% in July 2014. Shift JIS is the third-most declared character encoding for Japanese websites (though in effect it means its superset Windows-31J is used, so it is third-most popular), declared by 1.0% of sites in the .jp domain, while UTF-8 is used by 99% of Japanese websites.
Shift JIS is also sometimes used in QR codes (they are a Japanese invention also allowing UTF-8, which may though be preferred use).