O (kana)

Hiragana	Katakana
Transliteration	o
Hiragana Man'yōgana:	於
Katakana Man'yōgana	於
Spelling kana	大阪のオ (Ōsaka no "o")
Morse code	・－・・・
Braille
Unicode	U+304A, U+30AA
kana gojūon n wa ra ya ma ha na ta sa ka a sokuon wi ri mi hi ni chi shi ki i dakuten ru yu mu fu nu tsu su ku u chōonpu we re me he ne te se ke e wo ro yo mo ho no to so ko o

In Japanese writing, the kana お (hiragana) and オ (katakana) occupy the fifth place, between え and か, in the modern Gojūon (五十音) system of collating kana. In the Iroha, they occupy the 27th, between の and く. In the table at right (ordered by columns, from right to left), お lies in the first column (あ行, "column A") and the fifth row (お段, "row O"). Both represent [o].

Form	Rōmaji	Hiragana	Katakana
Normal a/i/u/e/o (あ行 a-gyō)	O	お	オ
	Ou Ō	おう, おぅ おお, おぉ おー, お～	オウ, オゥ オオ, オォ オー, オ～

Derivation

お and オ originate, via man'yōgana, from the kanji 於.

Variant forms

Scaled-down versions of the kana (ぉ, ォ) are used to express morae foreign to the Japanese language, such as フォ (fo).

Stroke order

Stroke order in writing お

Stroke order in writing オ

The hiragana お is made with three strokes:

1. A horizontal line from left to right.
2. A stroke consisting of a vertical line, a small diagonal line going upwards and to the left, and an open curve heading right and downwards.
3. A small curved stroke on the right.

The katakana オ is made with three strokes:

1. At the top, a horizontal stroke from left to right.
2. A downward vertical stroke cutting through the first stroke, with a small hook at the end facing left.
3. At the intersection of the first two strokes, a diagonal line going downwards and to the left.

Other communicative representations

• Braille:

－● ●－ －－

• Phonetic alphabet: 「大阪のオ」 ("o as in Osaka")
• Morse code: ・－・・・