Sorry to hear about your problem. I also had a problem recently with a sword returning from Japan after polish to Sweden. The sender tried to send it by EMS but the parcel were rejected because it was illegal to send "weapons" to Sweden. If it was an AK-47 I was trying to import without the proper paper work, damn right it would've been illegal. However regarding edged weapons knives, nihonto or even "china-tanas" there are no restrictions from the swedish side. Instead of EMS the parcel were sent by Fedex and were delivered with no problems whatsoever. What worries me is I've heard lately even Fedex refuses to carry swords? I think these issues is more of a carrier issue than problems with National laws even if I'm sure there are a few countries were these kind of items are prohibited. To be honest I can't imagine what the carrier would be afraid of? Ever heard of a terrorist ninja grabbing a nihonto from the cargo room in an aeroplane jumping out screaming kiai and hijacking the plane or any postal services anywhere in the world having a major problem with employees getting hurt by well packed nihonto in transit? Ridiculous!!! But of course it's an easy way of "sharpen" up security without having to do anything.
Regards
Daniel