View details and encodings for Unicode character U+FF70 Halfwidth Katakana-Hiragana Prolonged Sound Mark, located in the Halfwidth and Fullwidth Forms block and Modifier Letter category. This character was released in 1993 under Unicode version 1.1.
ーーU+FF70;65392\00FF70\uFF70\x{FF70}\u{FF70}u'\uFF70'