U+FF78 "ｸ" Halfwidth Katakana Letter Ku Unicode Character

U+FF78 "ｸ" Halfwidth Katakana Letter Ku is a typographic variant of the standard fullwidth katakana character ク, designed to occupy exactly half the horizontal space of its fullwidth counterpart for compatibility with legacy computer systems and text layouts that used a fixed-width grid. It is part of the halfwidth and fullwidth forms block in Unicode, which was created to support interoperability between East Asian and Western character encodings, particularly in early terminal environments where characters needed to fit a monospaced display. This character represents the syllable "ku" and is used primarily in modern contexts for historical data, certain digital text formats, or stylistic purposes where a compact appearance is desired.

General Properties

Code Point	U+FF78
Version Added	1.1
Name	Halfwidth Katakana Letter Ku
Block	Halfwidth and Fullwidth Forms
General Category	Other Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Narrow
Decomposition Mapping	"ク" U+30AF Katakana Letter Ku

Encodings

HTML Decimal Encoding	ｸ
HTML Hex Encoding	ｸ
UTF-8 Encoding	0xEF 0xBD 0xB8
UTF-16 Encoding	0xFF78
UTF-32 Encoding	0x0000FF78
C/C++/Java Escape	\uff78

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	"ク" U+30AF Katakana Letter Ku
NFKC Simple Casefold	"ク" U+30AF Katakana Letter Ku
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