Yukio Hatoyama, leader of the Democratic Party of Japan, criticized Prime Minister Yoshiro Mori on Thursday for attending a wedding in 1995 at which a gang boss was present.
"If this is true, it is a big problem," Hatoyama said at a lecture at the Foreign Correspondents Club of Japan. "We have already branded him as inappropriate as a prime minister, but I think this will serve to reinforce that."
The chief of Japan's largest opposition party said the DPJ would carry out its own investigation into the matter.
With your current subscription plan you can comment on stories. However, before writing your first comment, please create a display name in the Profile section of your subscriber account page.