Bro - you’ve gotta tell me how you got their attention. Congrats on making contact! I’ve been interested in working for that business ever since I was in school. I’ve never worked in Japan, but I lived there for 2 years, so I probably don’t have the advice you are looking for.
Japan is an interesting mix of super hyped up city streets and totally serene country villages surrounded by rice patties. If you go, you have to hit the Ramen bars and get a nice big hot steaming bowl of fresh Ramen. Great stuff, nothing like the fake instant stuff in the USA. (you can still find it here if you are looking though) Also, their streets remind me of Super Mario Bros.
One thing on doing business there - everybody carries business cards, even teenagers, and it’s almost a ritual to trade cards with new acquaintances. Two-handed is the usual etiquette.