Since I live pretty near to you and I have used Tenso many times before , I can advise you not to ship anything using EMS with Tenso as you will be charged by customs, and a lot of money. You can calculate how much it will cost you using Tenso shippin calculator but please note that if the box they use for shipping is too large (not the product, they use bigger boxes for small things sometimes don't know why) the fee is going to vary not depending on weight but on size. As kinix said thee fee from mumo to Tenso is 500yen.
Good luck
