U+FF77 "キ" Halfwidth Katakana Letter Ki Unicode Character

Unicode Version 17.0

U+FF77 "キ" Halfwidth Katakana Letter Ki is a typographic variant of the standard fullwidth Katakana character キ, representing the syllable "ki" in the Japanese writing system. It is part of the Halfwidth and Fullwidth Forms Unicode block, designed for compatibility with legacy character encodings and terminal displays that used a fixed-width grid. Halfwidth characters like U+FF77 occupy exactly half the horizontal space of their fullwidth counterparts, allowing them to align neatly within monospaced text environments such as early computer terminals, teletype machines, and some digital text systems. While its use has declined with modern Unicode-capable systems, it remains important for preserving the visual fidelity of older Japanese digital documents and certain specialized formatting contexts.

General Properties

Code Point U+FF77
Version Added 1.1
Name Halfwidth Katakana Letter Ki
Block Halfwidth and Fullwidth Forms
General Category Other Letter
Canonical Combining Class Not Reordered
Bidirectional Class Left To Right
Decomposition Type Narrow
Decomposition Mapping "キ" U+30AD Katakana Letter Ki

Encodings

HTML Decimal Encoding キ
HTML Hex Encoding キ
UTF-8 Encoding 0xEF 0xBD 0xB7
UTF-16 Encoding 0xFF77
UTF-32 Encoding 0x0000FF77
C/C++/Java Escape \uff77

Unicode Properties

NFC Quick Check Yes
NFD Quick Check Yes
Numeric Type None
Numeric Value NaN
Line Break Ideographic
East Asian Width Halfwidth
Changes When NFKC Casefolded Yes
NFKC Casefold "キ" U+30AD Katakana Letter Ki
NFKC Simple Casefold "キ" U+30AD Katakana Letter Ki
Script Katakana
Script Extensions Katakana
Indic Syllabic Category Other
ID Start Yes
XID Start Yes
ID Continue Yes
XID Continue Yes
Alphabetic Yes
Vertical Orientation Rotated
Grapheme Base Yes
Grapheme Cluster Break Other
Word Break Katakana
Sentence Break OLetter