During the 2012 China anti-Japanese demonstrations, on 13 September 2012, Lee remarked, "The Senkaku Islands, no matter whether in the past, for now or in the future, certainly belong to Japan." Ten years previously, he had stated, "The Senkaku Islands are the territory of Japan." In September 2014, Lee expressed support for a Japanese equivalent to the United States' Taiwan Relations Act, which was discussed in the Japanese Diet in February, though the idea was first proposed by Chen Shui-bian in 2006.