U+FF51 "ｑ" Fullwidth Latin Small Letter Q Unicode Character
Unicode Version 17.0
ｑ
U+FF51 "ｑ" Fullwidth Latin Small Letter Q is a typographic variant of the standard lowercase "q" designed to occupy the same width and vertical space as CJK (Chinese, Japanese, and Korean) characters. Part of the Halfwidth and Fullwidth Forms block, it is primarily used in East Asian text environments such as Japanese, where it enables Latin letters to blend visually with fullwidth ideographic characters in monospaced or proportional layouts. Unlike the regular halfwidth ASCII "q" (U+0071), this version has a width of one square em, making it essential for consistent alignment in documents, user interfaces, or code that mix Roman and CJK scripts.
General Properties
| Code Point | U+FF51 |
| Version Added | 1.1 |
| Name | Fullwidth Latin Small Letter Q |
| Block | Halfwidth and Fullwidth Forms |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Wide |
| Decomposition Mapping | "q" U+0071 Latin Small Letter Q |
Encodings
| HTML Decimal Encoding | ｑ |
| HTML Hex Encoding | ｑ |
| UTF-8 Encoding | 0xEF 0xBD 0x91 |
| UTF-16 Encoding | 0xFF51 |
| UTF-32 Encoding | 0x0000FF51 |
| C/C++/Java Escape | \uff51 |
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 | "Ｑ" U+FF31 Fullwidth Latin Capital Letter Q |
| Simple Titlecase Code Point | "Ｑ" U+FF31 Fullwidth Latin Capital Letter Q |
| Uppercase Code Point | "Ｑ" U+FF31 Fullwidth Latin Capital Letter Q |
| Titlecase Code Point | "Ｑ" U+FF31 Fullwidth Latin Capital Letter Q |
| Cased | Yes |
| Changes When Casemapped | Yes |
| Changes When NFKC Casefolded | Yes |
| Changes When Titlecased | Yes |
| Changes When Uppercased | Yes |
| NFKC Casefold | "q" U+0071 Latin Small Letter Q |
| NFKC Simple Casefold | "q" U+0071 Latin Small Letter Q |
| 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 |