参考になる

さんこうになる

to serve as a reference; to provide useful information; to be helpful; to be informative; to be instructive

expression verb

Example sentences

拗音（ようおん）（ゃ　ゅ　ょ）と促音（そくおん）（っ）の出（だ）し方（かた）も、加（くわ）えていただけると参考（さんこう）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).