grammar

Hi, guys! So I'm trying to maybe put together a Japanese UTAU cover of CircusP's Deja Vu, but I've only studied Japanese for a few years, so I don't know nearly enough about Japanese grammar/vocab. So if anyone here is fluent in Japanese (or knows any Japanese at all, really), I was wondering if...

OK, before you tell me it's for accuracy, I know that. I know japanese doesn't pluralize with the "s" so you're trying to maintain that. but this is a really, really clunky and often misused solution, e.g., using it when you want a possessive. so, why do you, personally, use it? where did you...