[Nyororin]

The US postal service no longer allows sea post. They ended the service a year or more ago. You can`t send it by sea no matter how much you`d like to. It`s not an issue with the Japanese postal service - apparently it`s a "terrorism" one.

Also, it`s technically illegal at this point in time to mail a weapon of any type - including decorative - to the US without some sort of permit. When it comes to swords, as it is currently illegal to remove the real things from Japan, you`ll also have to prove that it is a replica at practically every step of the way. (People try to smuggle the real thing out as a "replica" all the time.)

You`re going to have to go through a lot of pain to send something like this.