O (kana)

In Japanese writing, the kana (hiragana) and (katakana) occupy the fifth place, between and , in the modern Gojūon (五十音) system of collating kana. In the Iroha, they occupy the 27th, between and . 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
ou
oo
ō
おう, おぅ
おお, おぉ
おー
オウ, オゥ
オオ, オォ
オー
o
hiragana
japanese hiragana o
katakana
japanese katakana o
transliterationo
hiragana origin
katakana origin
Man'yōgana意 憶 於 應
spelling kana大阪のオ
(Ōsaka no "o")

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 お
Stroke order in writing オ
Stroke order in writing オ
Stroke order in writing お
Stroke order in writing お

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.
Stroke order in writing オ
Stroke order in writing オ

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

  • Full Braille representation
お / オ in Japanese Braille
お / オ
o
おう / オー
ō/ou
+う / +ー
chōon*
⠊ (braille pattern dots-24) ⠊ (braille pattern dots-24) ⠒ (braille pattern dots-25) ⠒ (braille pattern dots-25)

* When lengthening "-o" syllables in Japanese braille, a chōon is always used, as in standard katakana usage instead of adding an お / オ.

Character information
Preview
Unicode name HIRAGANA LETTER O KATAKANA LETTER O HALFWIDTH KATAKANA LETTER O CIRCLED KATAKANA O
Encodingsdecimalhexdechexdechexdechex
Unicode12362U+304A12458U+30AA65397U+FF7513012U+32D4
UTF-8227 129 138E3 81 8A227 130 170E3 82 AA239 189 181EF BD B5227 139 148E3 8B 94
Numeric character referenceおおオオオオ㋔㋔
Shift JIS[1]130 16882 A8131 7383 49181B5
EUC-JP[2]164 170A4 AA165 170A5 AA142 1818E B5
GB 18030[3]164 170A4 AA165 170A5 AA132 49 151 5584 31 97 37129 57 210 4881 39 D2 30
EUC-KR[4] / UHC[5]170 170AA AA171 170AB AA
Big5 (non-ETEN kana)[6]198 174C6 AE199 66C7 42
Big5 (ETEN / HKSCS)[7]198 240C6 F0199 166C7 A6
Character information
Preview
Unicode name HIRAGANA LETTER SMALL O KATAKANA LETTER SMALL O HALFWIDTH KATAKANA LETTER SMALL O
Encodingsdecimalhexdechexdechex
Unicode12361U+304912457U+30A965387U+FF6B
UTF-8227 129 137E3 81 89227 130 169E3 82 A9239 189 171EF BD AB
Numeric character referenceぉぉォォォォ
Shift JIS[1]130 16782 A7131 7283 48171AB
EUC-JP[2]164 169A4 A9165 169A5 A9142 1718E AB
GB 18030[3]164 169A4 A9165 169A5 A9132 49 150 5584 31 96 37
EUC-KR[4] / UHC[5]170 169AA A9171 169AB A9
Big5 (non-ETEN kana)[6]198 173C6 AD199 65C7 41
Big5 (ETEN / HKSCS)[7]198 239C6 EF199 165C7 A5

References

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