Source: Twinavi
Source: Twinavi
The kit used to prepare the sushi candy seen on the video can be found in Amazon Japan.
Source: Reddit
In the first auction of the year in the Tsukiji fish market in Tokyo the most expensive tuna in history has been sold for 32.49 million yen (around 300,000 euros/390,000 dollars). The tuna weights 342 kg; however the weight nor the quality was what made it that expensive, but being the first tuna sold in the year 2011. It was bought by the owners of a sushi restaurants chain.
Source: Japanprobe.