CJK Compatibility

{{distinguish|CJK Compatibility Forms|CJK Compatibility Ideographs}}

{{for|a list of all CJK characters encoded in Unicode|CJK Unified Ideographs}}

{{Infobox Unicode block

|rangestart = 3300

|rangeend = 33FF

|script1 = {{nowrap|Katakana (88 char.)}}

|script2 = {{nowrap|Common (168 char.)}}

|1_0_0 = 187

|1_1 = 62

|4_0 = 7

|note = {{Cite web|url=https://www.unicode.org/ucd/|title=Unicode character database|work=The Unicode Standard|accessdate=2023-07-26}}{{Cite web|url=https://www.unicode.org/versions/enumeratedversions.html|title=Enumerated Versions of The Unicode Standard|work=The Unicode Standard|accessdate=2023-07-26}}

}}

File:UCB_CJK_Compatibility.png

CJK Compatibility is a Unicode block containing square symbols (both CJK and Latin alphanumeric) encoded for compatibility with East Asian character sets. In Unicode 1.0, it was divided into two blocks, named CJK Squared Words (U+3300–U+337F) and CJK Squared Abbreviations (U+3380–U+33FF).{{cite web |url=https://www.unicode.org/versions/Unicode1.0.0/CodeCharts2.pdf |work=The Unicode Standard |version=version 1.0 |title=3.8: Block-by-Block Charts |publisher=Unicode Consortium}}

The square forms can have different presentations when they are used in horizontal or vertical text.

For example, the characters {{unichar|333E}} (from {{lang|ja|ボルト}}) and {{unichar|3327}} (from {{lang|ja|トン}}) should look different in horizontal and in vertical right-to-left:{{cite web |last1=Lunde |first1=Ken |last2=Ishi |first2=Koji |author1-link=Ken Lunde |title=UAX #50: Unicode Vertical Text Layout |url=https://www.unicode.org/reports/tr50/ |website=www.unicode.org |access-date=13 June 2024 |language=en |date=2023-07-17}} {{Vertical text|style=writing-mode: vertical-rl; |㌧㌾}}

Characters U+337B through U+337E are the Japanese era calendar scheme symbols Heisei (㍻), Shōwa (㍼), Taishō (㍽) and Meiji (㍾) (also available in certain legacy sets, such as the "NEC special characters" extension for JIS X 0208, as included in Microsoft's version and later JIS X 0213).{{cite web |url=https://blogs.adobe.com/CCJKType/2019/03/era-name-ligature-history.html |title=A Brief History of Japan's Era Name Ligatures |last=Lunde |first=Ken |author-link=Ken Lunde |work=CJK Type Blog |date=2019-03-21 |publisher=Adobe Inc}} The Reiwa era symbol ({{unichar|32FF}}) is in Enclosed CJK Letters and Months (the CJK Compatibility block having been fully allocated by the time of its commencement).