拗音

ようおん

noun

•

contracted sound, palatalised sound (e.g. Japanese morae with small kana), palatalized sound(linguistics)(e.g. きゃ)

拗	crooked, twisted, distorted, perverted, cross
音	sound, noise

ようおん

（ゃ　ゅ　ょ）

そくおん

（

っ

）

だ

かた

、

くわ

さんこう

I think it might be useful if you could add how to output the diphthongs (with small ya/yu/yo) and geminate consonants (with small tsu)