You are welcome
Did you read the other visa threads?
Transfer citizenship and forgo the visa process?
No.
Any non-Japanese who wants to come to Japan MUST have a visa of some description.
Easiest would be to have a degree (minimum 3 year degree) and get a job teaching English.
For a business investor visa you would need a LOAD of money and a proven track record of owning and operating a successful business and a watertight plan to operate one here.
An internet business would not be likely to be accepted.
Do you know how hard it is for people to move to America?
It is harder for folks to come here.
Basically they want to see that you can contribute something that can not be contributed by a Japanese person.
I suggest getting the degree