Su (hiragana: ãÂÂ, katakana: ã¹) is one of the Japanese kana, each of which represents one mora. Their shapes come from the kanji 寸 and é Â, respectively. Both kana represent the sound . In the Ainu language, the katakana ã¹ can be written as small ã² to represent a final s and is used to emphasize the pronunciation of [s] rather than the normal [ÃÂ] (represented in Ainu as ã±).
<nowiki>*</nowiki> ã¹ã£ and ãºã£ are also used to present si and zi pronunciations respectively. For example, 'C' is presented as ã¹ã£ã¼ . See also Hepburn romanization.