A new leak of financial documents that follows the so-called Panama Papers has uncovered business ties between U.S. Commerce Secretary Wilbur Ross and Russia, as well as alleged tax evasion by an aide to Canadian Prime Minister Justin Trudeau.

Former state leaders have also been named in the documents, including former Prime Minister Yukio Hatoyama, who became honorary chairman of a Hong Kong-based energy company incorporated in Bermuda, a British territory also known as a corporate tax haven, from 2013 after retiring from politics.

Hatoyama has denied any involvement in the company management of Hoifu Energy Group Ltd., saying, "I was told that just placing my name (among the officials' list) is enough. I am an honorary chairman and there is no substantial meaning."