促音便
そくおんびん
nasal sound change (generation of geminate consonant, primarily a geminate 't' from vowel stems ending in 'i')
促音 is read as そくおん (sokuon) and means geminate consonant (small "tsu" in Japanese).
そくおん
sokuon
そくおんびん
nasal sound change (generation of geminate consonant, primarily a geminate 't' from vowel stems ending in 'i')
拗音(ゃ ゅ ょ)と促音(っ)の出し方も、加えていただけると参考になるかもしれません。
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).