Combining form of や, used in yōon mora (拗音) that end in the a sound.
Usage notes
This letter appears in the hiragana きゃ(kya), しゃ(sha), ちゃ(cha), にゃ(nya), ひゃ(hya), みゃ(mya), and りゃ(rya); in the dakuten (濁点) ぎゃ(gya), じゃ(ja), and びゃ(bya); and in the handakuten (半濁点) ぴゃ(pya).