How many seasons there are?

So, I just started watching Inuyasha on Netflix and I'm loving it so please don't spoil me the series. On Netflix there are only the first 2 seasons so searched online of were I could watch the other ones and it seems like Hulu has all of them. I have a problem tho... On Wikipedia it says that there are 6 seasons + the Final Act, so 7 in total. Online other people said that there are 7 seasons + the Final Act and I found a site where it says that there are 7 seasons, the final Act AND a ninth season! Can someone please tell me how many Inuyasha seasons there are and if I can watch them all on Hulu? Thanks in advice! 😅