U+FF29 "Ｉ" Fullwidth Latin Capital Letter I Unicode Character
Unicode Version 17.0
Ｉ
U+FF29 "Ｉ" Fullwidth Latin Capital Letter I is a typographic variant of the standard uppercase letter I, designed to occupy the same character width as CJK (Chinese, Japanese, and Korean) ideographs, which are typically square shaped and twice as wide as halfwidth Latin letters. This fullwidth form is primarily used in East Asian text processing to maintain visual alignment within monospaced scripts, such as in Japanese environment where it may appear alongside kanji, hiragana, or katakana. It is encoded in the Unicode Fullwidth Forms block and corresponds to the halfwidth character "I" (U+0049) but adjusted for compatibility with legacy character sets like Shift JIS and with a fixed width of two ideographic units.
General Properties
| Code Point | U+FF29 |
| Version Added | 1.1 |
| Name | Fullwidth Latin Capital Letter I |
| Block | Halfwidth and Fullwidth Forms |
| General Category | Uppercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Wide |
| Decomposition Mapping | "I" U+0049 Latin Capital Letter I |
Encodings
| HTML Decimal Encoding | Ｉ |
| HTML Hex Encoding | Ｉ |
| UTF-8 Encoding | 0xEF 0xBC 0xA9 |
| UTF-16 Encoding | 0xFF29 |
| UTF-32 Encoding | 0x0000FF29 |
| C/C++/Java Escape | \uff29 |
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 | "ｉ" U+FF49 Fullwidth Latin Small Letter I |
| Lowercase Code Point | "ｉ" U+FF49 Fullwidth Latin Small Letter I |
| Simple Case Folding | "ｉ" U+FF49 Fullwidth Latin Small Letter I |
| Case Folding | "ｉ" U+FF49 Fullwidth Latin Small Letter I |
| Cased | Yes |
| Changes When Casefolded | Yes |
| Changes When Casemapped | Yes |
| Changes When Lowercased | Yes |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "i" U+0069 Latin Small Letter I |
| NFKC Simple Casefold | "i" U+0069 Latin Small Letter I |
| 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 |