Lost my jacket on the super train

Hello. I was on holiday through Japan in December last year. I was on one of the shinkansens when I accidentally left my jacket on the train. I know its in lost property since when I inquired someone pointed it out. However at the time it was all the way up the other side of Japan.

Currently I'm in Australia, and I was just wondering if there was a way to collect or to have my jacket sent to me from Japan?

Let us know,

Cheers