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In Japanese writing, the kana 'う' (hiragana) and 'ウ' (katakana) (romanised ''u'') occupy the third place in the modern Gojūon (五十音) system of collating kana. In the Iroha, they occupied the 24th position, between む and ゐ. In the Gojūon chart (ordered by columns, from right to left), う lies in the first column (あ行, "column A") and the third row (う段, "row U").
Their pronunciation '' is normally transcribed as , as this captures both the lack of rounding common to back vowels and the somewhat fronted articulation, though in certain contexts it is closer to a close back rounded vowel . It is perhaps a near-back vowel.

Form	Rōmaji	Hiragana	Katakana
Normal ''a''/''i''/''u''/''e''/''o'' (あ行 ''a-gyō'')	''u''	う	ウ
	''uu'' ''ū''	うう, うぅ うー	ウウ, ウゥ ウー

Other additional forms
'Form A (''w-'')' ''wha'' うぁ ウァ ''wi'' うぃ ウィ (''wu'') (う) (ウ) ''we'' うぇ ウェ ''who'' うぉ ウォ	'Form B (''v-'')' ''va'' ''none'' ヴァ ''vi'' ''none'' ヴィ ''vu'' none ヴ ''ve'' ''none'' ヴェ ''vo'' ''none'' ヴォ

Contents

Derivation

Variant forms

Strokes

Representations in other writing systems

Derivation

Both う and ウ originate, via man'yōgana, from the kanji (pronounced ''u'' and meaning ''space'').

Variant forms

Scaled-down versions of the characters (ぅ, ゥ) are used to create new morae that do not exist in the Japanese language, such as トゥ (tu). This convention is relatively new, and many older loanwords do not use it. For example, in the phrase ''Tutankhamun's cartouche'', the recent loan ''cartouche'' uses the new phonetic technique, but the older loan ''Tutankhamun'' uses ツ (tsu) as an approximation:
'ツ'タンカーメンの カル'トゥ'ーシュ
The character う is also used, in its full-sized form, to lengthen "o" sounds. For example, the word 構想 is written in hiragana as こうそう (kousou), pronounced ''kōsō''. In a few words the character お (o) is used instead for historical reasons.
The character ウ can take dakuten to form ヴ (vu), a sound foreign to the Japanese language and traditionally approximated by ブ (bu).

Strokes

The hiragana う is written in two strokes:
# At the top of the character, a short diagonal crook: proceeding diagonally downwards from the left, then reversing direction and ending at the lower left.
# A broad curving stroke: beginning at the left, rising slightly, then curving back and ending at the left.


The katakana ウ is written in three strokes:
# At the top of the character, a short vertical stroke, written from top to bottom.
# A similar stroke, but lower and positioned at the left.
# A broad angled stroke: beginning as a horizontal line written from left to right, then reversing direction and proceeding downwards from right to left as a curved diagonal. The horizontal line must touch both the other strokes. Apart from the short diagonal, the character is identical to フ.

Representations in other writing systems

★ Braille:
:

●● －－ －－

★ Phonetic alphabet: 「上野のウ」 ("''u'' of ''Ueno''")

★ Morse code: ・・－