You can see the whole process of a blue fin tuna's journey Canada's east coast to Tsukiji on the Canada TV show "Chef Aboard" Episode "Bluefin Tuna, Canada to Japan" at http://www.foodtv.ca/video/
You have drill down the menus. I don't get the direct link.
Click on "Full Episodes A-E" in the middle bar and then Chef Abroad.
The Aircraft Carrier episode and Tokyo Food Adventure episode are interesting too.