U+FF59 "ｙ" Fullwidth Latin Small Letter Y Unicode Character
Unicode Version 17.0
ｙ
U+FF59 "ｙ" Fullwidth Latin Small Letter Y is a typographic variant of the standard Latin letter "y" designed to occupy the same width as CJK (Chinese, Japanese, and Korean) characters, typically for use in monospaced or ideographic text environments such as East Asian computing. It belongs to the Halfwidth and Fullwidth Forms block and is encoded specifically for compatibility with legacy character sets, where it is used to achieve consistent visual alignment in mixed scripts, especially Japanese Shift JIS encoding. Unlike its regular-width counterpart, this character takes up a full square space on screen, making it suitable for formatting digital text that includes both Latin and fullwidth characters in documents or terminal displays.
General Properties
| Code Point | U+FF59 |
| Version Added | 1.1 |
| Name | Fullwidth Latin Small Letter Y |
| Block | Halfwidth and Fullwidth Forms |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Wide |
| Decomposition Mapping | "y" U+0079 Latin Small Letter Y |
Encodings
| HTML Decimal Encoding | ｙ |
| HTML Hex Encoding | ｙ |
| UTF-8 Encoding | 0xEF 0xBD 0x99 |
| UTF-16 Encoding | 0xFF59 |
| UTF-32 Encoding | 0x0000FF59 |
| C/C++/Java Escape | \uff59 |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Ideographic |
| East Asian Width | Fullwidth |
| Lowercase | Yes |
| Simple Uppercase Code Point | "Ｙ" U+FF39 Fullwidth Latin Capital Letter Y |
| Simple Titlecase Code Point | "Ｙ" U+FF39 Fullwidth Latin Capital Letter Y |
| Uppercase Code Point | "Ｙ" U+FF39 Fullwidth Latin Capital Letter Y |
| Titlecase Code Point | "Ｙ" U+FF39 Fullwidth Latin Capital Letter Y |
| Cased | Yes |
| Changes When Casemapped | Yes |
| Changes When NFKC Casefolded | Yes |
| Changes When Titlecased | Yes |
| Changes When Uppercased | 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 | Lower |