U+FF66 "ヲ" Halfwidth Katakana Letter Wo Unicode Character

Unicode Version 17.0

U+FF66 "ヲ" Halfwidth Katakana Letter Wo is a specifically encoded variant of the katakana character ヲ, designed with a narrower, half-width glyph that occupies half the horizontal space of a standard full-width character, a feature originally developed for compatibility with older computer systems and character sets that used fixed-width fonts and needed to fit more characters per line. This character represents the syllable "wo" in the Japanese writing system, though in modern Japanese it is rarely used to represent the sound "wo" in native words and primarily appears in certain proper nouns, archaic texts, or as a grammatical particle in some contexts. Its half-width form is part of the Halfwidth and Fullwidth Forms Unicode block, which was created to facilitate interoperability between Japanese text in different encoding environments, particularly for legacy applications like terminal emulators or early electronic communication systems.

General Properties

Code Point U+FF66
Version Added 1.1
Name Halfwidth Katakana Letter Wo
Block Halfwidth and Fullwidth Forms
General Category Other Letter
Canonical Combining Class Not Reordered
Bidirectional Class Left To Right
Decomposition Type Narrow
Decomposition Mapping "ヲ" U+30F2 Katakana Letter Wo

Encodings

HTML Decimal Encoding ヲ
HTML Hex Encoding ヲ
UTF-8 Encoding 0xEF 0xBD 0xA6
UTF-16 Encoding 0xFF66
UTF-32 Encoding 0x0000FF66
C/C++/Java Escape \uff66

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 "ヲ" U+30F2 Katakana Letter Wo
NFKC Simple Casefold "ヲ" U+30F2 Katakana Letter Wo
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