I have received the iaito sword three days after I had e-mailed them. I was very concerned about it since they didn't replied me right away. Then, on the third day, I finally received the iaito sword from the post office, plus, I got an e-mail from Tozando saying that they had sent out the sword two days ago and I should received by then.
I was planning to call them to see what's going on with the delay, but since I've received the iaito sword already, I didn't bother to ask them for the reasons.
Anyways, thank you very much everyone for your valuable advices.