U+FF2A "Ｊ" Fullwidth Latin Capital Letter J Unicode Character
U+FF2A "Ｊ" Fullwidth Latin Capital Letter J is a typographic variant of the standard Latin capital letter J, designed to occupy the same width as a CJK (Chinese, Japanese, and Korean) character, typically twice the width of a standard Latin character. It is part of the Halfwidth and Fullwidth Forms Unicode block, which was created to enable compatibility with legacy character encodings that required uniform spacing for East Asian text. This character is often used in vertically oriented writing or in monospaced environments where alignment with other fullwidth characters, such as those in Japanese or Chinese scripts, is necessary. Its appearance is identical to a regular J but scaled to fill the full square character cell common in East Asian typography.
General Properties
| Code Point | U+FF2A |
| Version Added | 1.1 |
| Name | Fullwidth Latin Capital Letter J |
| Block | Halfwidth and Fullwidth Forms |
| General Category | Uppercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Wide |
| Decomposition Mapping | "J" U+004A Latin Capital Letter J |
Encodings
| HTML Decimal Encoding | Ｊ |
| HTML Hex Encoding | Ｊ |
| UTF-8 Encoding | 0xEF 0xBC 0xAA |
| UTF-16 Encoding | 0xFF2A |
| UTF-32 Encoding | 0x0000FF2A |
| C/C++/Java Escape | \uff2a |
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 | "ｊ" U+FF4A Fullwidth Latin Small Letter J |
| Lowercase Code Point | "ｊ" U+FF4A Fullwidth Latin Small Letter J |
| Simple Case Folding | "ｊ" U+FF4A Fullwidth Latin Small Letter J |
| Case Folding | "ｊ" U+FF4A Fullwidth Latin Small Letter J |
| Cased | Yes |
| Changes When Casefolded | Yes |
| Changes When Casemapped | Yes |
| Changes When Lowercased | Yes |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "j" U+006A Latin Small Letter J |
| NFKC Simple Casefold | "j" U+006A Latin Small Letter J |
| 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 |