Glad to see you have decided to go to Japan.
I lived in Japan for 18 months and had an incredible experience. I chose to work out in the countryside in Nagano Prefecture as the people are very friendly and have the most beautiful hearts.
All the weirdo's reside in Tokyo so remember that if you don't like working for the company there are 100's of others that will snap you up in a heart beat.
Great money and one of the best experiences you will ever have. I am very jealous.
Good Luck.