and then I realized... I gave them a wrong zipcode by a typo -_-;....
Would my package be sent back to japan or do they double check at the post office if the zipcode is right (my post office did this for me but I'm not sure if it's the same way in Japan?) Thanks.. I'm .. really pissed at myself for this stupidity -_-;.
EDIT: Thank you for all the answers!! You have no idea how much relief they brought <33.