U+FF39 "Ｙ" Fullwidth Latin Capital Letter Y Unicode Character
Unicode Version 17.0
Ｙ
U+FF39 "Ｙ" Fullwidth Latin Capital Letter Y is a typographic variant of the standard capital Y, designed to occupy the same width as a CJK (Chinese, Japanese, and Korean) character, typically filling one square em space. It is part of the Halfwidth and Fullwidth Forms block in Unicode, created to maintain visual alignment and consistency in mixed script text, such as when Latin letters appear alongside fullwidth East Asian characters. This character is distinct from the regular ASCII Y in its width and Unicode range, and it is used primarily in contexts like literature, signage, and digital displays where monospaced or uniform character spacing is culturally or aesthetically required.
General Properties
| Code Point | U+FF39 |
| Version Added | 1.1 |
| Name | Fullwidth Latin Capital Letter Y |
| Block | Halfwidth and Fullwidth Forms |
| General Category | Uppercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Wide |
| Decomposition Mapping | "Y" U+0059 Latin Capital Letter Y |
Encodings
| HTML Decimal Encoding | Ｙ |
| HTML Hex Encoding | Ｙ |
| UTF-8 Encoding | 0xEF 0xBC 0xB9 |
| UTF-16 Encoding | 0xFF39 |
| UTF-32 Encoding | 0x0000FF39 |
| C/C++/Java Escape | \uff39 |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Ideographic |
| East Asian Width | Fullwidth |
| Uppercase | Yes |
| Simple Lowercase Code Point | "ｙ" U+FF59 Fullwidth Latin Small Letter Y |
| Lowercase Code Point | "ｙ" U+FF59 Fullwidth Latin Small Letter Y |
| Simple Case Folding | "ｙ" U+FF59 Fullwidth Latin Small Letter Y |
| Case Folding | "ｙ" U+FF59 Fullwidth Latin Small Letter Y |
| Cased | Yes |
| Changes When Casefolded | Yes |
| Changes When Casemapped | Yes |
| Changes When Lowercased | Yes |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "y" U+0079 Latin Small Letter Y |
| NFKC Simple Casefold | "y" U+0079 Latin Small Letter Y |
| Script | Latin |
| Script Extensions | Latin |
| Indic Syllabic Category | Other |
| ID Start | Yes |
| XID Start | Yes |
| ID Continue | Yes |
| XID Continue | Yes |
| Alphabetic | Yes |
| Vertical Orientation | Upright |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Alphabetic letter |
| Sentence Break | Upper |