I had thought that for writing long vowels in Japanese, that small kana was mostly used with hiragana and ー was mostly used with katakana. I was actually thinking of asking whether there were ...
For words like パーティー (party), I know ー is doubling the ア and イ. But for a word like センセイ (and let's assume for the sake of argument that it is regularly spelled in katakana), would it be センセイ or センセー ...
Are there words written with "ei" or "ou" that are pronounced with both vowels instead of as a long vowel? I think this is true in cases like 拾う and している, but are there cases of it happening where ...