U+FF70 HALFWIDTH KATAKANA-HIRAGANA PROLONGED SOUND MARK

The Unicode character U+FF70, officially named HALFWIDTH KATAKANA-HIRAGANA PROLONGED SOUND MARK, was introduced in Unicode version 1.1. It is part of the Half And Full Forms block, which belongs to the Basic Multilingual plane.

Categorized technically as a Modifier Letter, this character typically falls under the Common script. In terms of text layout and rendering, the glyph is Unknown and has halfwidth in East Asian typography. When placed in bidirectional text, it behaves as an Left-To-Right character. Its visual representation remains not mirrored regardless of the reading direction.