What materials do you need to become a mangaka?

Hm...while I'm not quite an expert, I do know that you need a lot of different types of pens to ink with(fine, bold, etc.) ; you also need a lot of screentone. Sometimes they have papers with the manga guidelines already on them, so that could be useful. You'll need lots of ink: black, white, and colored(for color pages, of course). A computer can also be very useful when it has the right programs installed in it, not to mention you can go on the internet for research. I also think it would be helpful if you carried a notebook or notepad around with you in case you came up with an idea or a quote or a plot or something...that's everything I can think of on the spot. I'll update if I think of more.