"Immigrate to Japan" means what?
Get a job here?
Go to school here?
Get married to a Japanese and live here?
If you are talking about getting a job with just an AD, no.
Immigration requires that most work visa applicants have either a bachelor's degree or a certain number of years of work experience (usually 10). Even so, non-teaching jobs usually require high fluency in Japanese reading/speaking/writing. You have not mentioned your language ability, but if you are like most people who ask these sorts of questions, you probably are very low level.
Is it possible to come here and get a job without a bachelor's degree? Yes.
Is it easy? No, and the odds are against you.
Visas that don't require a bachelor's degree:
Student visas will let you work part-time, but you don't sound as if you want to get more schooling.
Cultural activities visas let you work part-time, but you usually need prior experience with the CA (swordmaking, martial arts, pottery, etc.).
Dependent visas, but you have to be married to a foreigner who has a valid visa, and you can only work PT.
Spouse visas, but you have to be married to a Japanese, and even though you can do any sort of work, not just what a work visa permits, you will need to be seen by employers as qualified vocationally and in terms of language skills.
Intracompany transfer visas, but you have to work at the company abroad for a year first.
Working holiday visas. These are limited to non-Americans, so it doesn't apply to you, and they are only good for a year anyway.
The intracompany transfer visa, student visa and cultural activities visa are not good for long-term stay, either.
Get the degree or wait for 10 years to get experience. Learn plenty of Japanese, too.
But have you even visited Japan to know the least bit of what it's like here? Your profile says no, and that you are also a manga/anime fan. Not good for job prospects.