Su (hiragana: す, katakana: ス) is one of the Japanese kana, each of which represents one mora. Their shapes come from the kanji 寸 and 須, respectively. Both kana represent the sound . In the Ainu language, the katakana ス can be written as small ㇲ to represent a final s and is used to emphasize the pronunciation of [s] rather than the normal [ɕ] (represented in Ainu as ㇱ). In loanwords, this dakuten form of this kana, as opposed to ツ's dakuten form, can be used when transliterating "ds" such as kids キッズ kizzu and birds ば—っず.
FormsRōmajiHiraganaKatakanaNormal s-(さ行 sa-gyō)suすスsuu, swusūすう, すぅすースウ, スゥスーAddition dakuten z-(ざ行 za-gyō)zuずズzuu, zwuzūずう, ずぅずーズウ, ズゥズー
Other additional forms+Form A (sw-/sy-)RomajiHiraganaKatakanaswaすぁ, すゎスァ, スヮswi, si, syiすぃスィ *(swu)すぅスゥsweすぇスェswoすぉスォsyaすゃスャsyuすゅスュsyeすぃぇスィェsyoすょスョ+Form B (zw-/zy-)RomajiHiraganaKatakanazwaずぁ, ずゎズァ, ズヮzwi, zi, zyiずぃズィ *(zwu)ずぅズゥzweずぇズェzwoずぉズォzyaずゃズャzyuずゅズュzyeずぃぇズィェzyoずょズョ
* スィ and ズィ are also used to present si and zi pronunciations respectively. For example, 'C' is presented as スィー . See also Hepburn romanization.
Stroke order 2 2
Other communicative representations
Braille forms す / ス in Japanese Braille す / ス su ず / ズ zu すう / スー sū ずう / ズー zū Other kana based on Braille す しゅ / シュ shu じゅ / ジュ ju しゅう / シュー shū じゅう / ジュー jū
Computer encodings
References