♡Take a look:
http://www.jobsinjapan.com/
http://www.gaijinpot.com/
http://job.japantimes.com/index_e.php
http://japan.recruit.net/
http://www.daijob.com/en/
Hope you find something.
You may want to learn Japanese first.
You have to have a solid job offer and your work visa ready before you can come work/live in Japan. The company that hires you will assist you with that. Other things to consider will be getting a place to live and so on and so on. Difficult things to get done if you don't speak Japanese and if you are a foreigner.
~One of my friends is working here in this field and she just came over/transferred with her current company in the states. They took care of all the paperwork, housing, cell phones... You may want to go that route.
Good luck and I hope that helps!♡