How do I get large carpets (or furniture) shipped from the US to Japan?

I am looking for very large and very modern carpets and Japan has nothing that fits, I have been all over the place in Japan and even online, we're looking at 11×13 feet (3.5mx4m) carpets and I am never willing to spend 10 million yen on a Persian. In America these sizes are very common and very cheap with very good quality found online. How can I get these shipped to Japan? The longest side will always be 11 feet (3.5 meters) which exceeds any pallet or postal service limits. Is there any service out there? I am happy to place a large order for many other large furniture items from the US.