There is an interesting look at in this link which I will leave a few quotes from.
OSU researcher says Japanese whale killings hidden and proves that Japan's statistics on the endangered fin whales it has killed are bogus.Now Fin whales are the second largest animals on Earth, it is said that even the Nisshin Maru struggles to process them. This raises the spectre that Japan may very well have a secret pirate whaling ship operating as the Soviets did in the 1980's.
Baker and colleagues started their detective work when they bought whale meat from shops in Japan in 2006 and 2007. Using DNA fingerprinting, they soon discovered that the meat came from morefin whales than Japan has acknowledged killing.
"Clearly there must be an undocumented source of these whales," Baker said, "but we don't know what it is."
For those interesting in some of the history behind Japans secret whaling operations I provide these sources.
1, 2, 3, 4, 5, 6, 7, 8, 9, 10,