Thank you for your email!
How nice that you like our site. I don't see any problem with you selling things from Japan, it's actually qiuet common with sellers from overseas and we have a couple of Chinese members that are very succesful on the site.
Just make sure you have a clear and nice description of the objects and have an emailadress that you check often so the buyers easily can get in touch with you.
Good luck with your affairs and don't hesitate to ask if you have more questions!