Bringing Airsoft guns into Japan?

Hey guys, I'm moving to Japan at the end of this year and I wanted to know if I could take my guns over there. I have done some research but they were from 5+ year old forums/websites and I would really appreciate it if someone who knows the laws better can tell me.

I own 3 AEG's and I have dropped the power below 0.98J @.2g, its just that I have no clue on whether I should send it or take them with me.

Any help is appreciated