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Halfwidth Katakana Letter O Letter

オ is the halfwidth Katakana letter O (U+FF75), commonly used in legacy Japanese text layouts.

U+FF75

オ is a halfwidth variant of the Japanese Katakana “オ”. It’s useful when you need a narrower character that fits legacy or fixed-width environments. Below you’ll find meaning, copy options, and ready-to-use examples.

Halfwidth Katakana Letter O Letter Meaning

オ (HALFWIDTH KATAKANA LETTER O) is a Unicode character with codepoint U+FF75. It represents the “O” sound in Japanese Katakana, in halfwidth form. Visually, it is narrower than the standard fullwidth Katakana letter “オ”, which is often important in older Japanese encodings, fixed-width displays, and certain UI or terminal layouts. In plain text, it may appear in input that was converted from halfwidth Katakana sources or when matching formatting requirements. When searching or validating text, it’s best to treat it as distinct from its fullwidth counterpart.

Common uses

  • Copying halfwidth Katakana into fixed-width forms or legacy document templates
  • Matching existing text formatting where halfwidth characters are required for alignment
  • Using in UI fields that expect halfwidth Japanese input (e.g., certain older systems)
  • Preparing data for systems that store or display halfwidth Katakana specifically
  • Workflows that preserve original character width (e.g., text normalization comparisons)

Examples

オ (Halfwidth Katakana Letter O)

  • オカジ
  • オーナー
  • オオサカ
  • オフィス
  • オーダー

Variations

Technical codes

UnicodeU+FF75
HTML Entityオ
HTML Codeオ
CSS\FF75

FAQ

What does the Halfwidth Katakana Letter O letter mean?

オ (HALFWIDTH KATAKANA LETTER O) is a Unicode character with codepoint U+FF75. It represents the “O” sound in Japanese Katakana, in halfwidth form. Visually, it is narrower than the standard fullwidth Katakana letter “オ”, which is often important in older Japanese encodings, fixed-width displays, and certain UI or terminal layouts. In plain text, it may appear in input that was converted from halfwidth Katakana sources or when matching formatting requirements. When searching or validating text, it’s best to treat it as distinct from its fullwidth counterpart.

Is オ the same as the normal Katakana オ?

No. オ is the halfwidth Katakana Letter O (U+FF75). The standard fullwidth Katakana letter is a different character (visually wider and different codepoint).

What is the Unicode codepoint for オ?

It is U+FF75 (HALFWIDTH KATAKANA LETTER O).

How can I paste オ using HTML?

Use the HTML entity: オ

How do I represent オ in CSS or JavaScript?

CSS escape: \\FF75. JavaScript (Unicode escape): \\u{FF75}.