I don't know how old you are, but if you're a mature and responsible young man, there's always ways you can earn extra money if you use some initiative and creativity.
I did it when I was growning up to make budo trips and seminars and pay my own way. My own son did it also.
Decide that you want to go, figure out how you can arrange travel, etc. and what it will cost and then get busy to earn the money you need.
Good luck and as they say in Japan, Gambatte!
(Don't give up!)