What does the ”なの” in this sentence mean?


> ここは、おすしがぜんぶ百円なの？

I've read somewhat a lot on "na no" and just came to the conclusion that is
something used to end a sentence similar to desu, but used mainly with
females. So I was just wondering if this was the case in my sentence. Also the
"お" written before "sushi" is just a honorific prefix right? Or does it
meaning something else / have another use in the sentence?




That なの or any other のだ forms indicate that information that's accompanied
with it is one to complement existing context. (In sentences of statement, it
functions as explanation of background for a preceding topic.)

In your example, it's probably used in a situation where you reconfirm it
after your opponent said that all the sushi there are 100 yen, or so. That's
why she is using an interrogative sentence with a のだ form.

Edit: For some reason, emphasizing なの is often considered a feminine factor in
fiction but in reality it's equally used regardless of gender and even when
men use it, it doesn't sound girly. Old textbooks might still teach that bias.

