Some mangas do have fillers, but it's not as common as in anime.
It depends on the manga. Some series might include filler-like content to extend the story or add extra details, but it's not a widespread phenomenon like in anime. Usually, mangas stick more closely to the main plot.
In general, mangas don't typically have fillers. They tend to have a more focused narrative without unnecessary additions to stretch the plot. But there can be exceptions depending on the author's style and the publishing requirements.
Yes, they do. There are Chinese creators who produce mangas in various genres and styles.
Yes, many mangas do have ISBN numbers. These help in identifying and cataloging the publications.
Yes, manga can have fillers. Sometimes authors use them to flesh out characters or settings, or to give themselves more time to plan the main plot. But too many fillers can make the story drag.
Most mangas are in black and white. Color mangas are less common but do exist.
Most of the time, no. Mangas are categorized differently, like for kids, teens, or adults. An AR level isn't a common way to classify them. It's more about themes, violence, and such factors.
The Naruto manga itself doesn't have fillers. Fillers are a common thing in anime to extend the runtime or bridge gaps in the manga's story. But the manga sticks strictly to the main plot.
No, the Bleach manga doesn't have fillers. It follows a consistent storyline throughout.
Yes, it does have some fillers. But they don't take away from the main story too much.
No, Naruto doesn't have fillers in the manga. Fillers are usually introduced in the anime adaptation and not in the original manga.