Japan's former prime minister Yukio Hatoyama bows in front of a memorial stone during his visit to the Seodaemun Prison History Hall in Seoul, South Korea, Aug 12, 2015. [Photo/IC]

The 1931 incident marked the beginning of the Japanese invasion of northeast China.

The former Prime Minister said he agreed with Emperor Akihito, but unfortunately Prime Minister Shinzo Abe did not have the same idea.

Japan's role of "aggression" and "colonial rule" was clearly stated in the Murayama Statement, the landmark 1995 apology on the 50th war-end anniversary which was authored by the then Prime Minister Tomiichi Murayama, but Prime Minister Shinzo Abe seemed do not like it, "at least within a certain period." Hatoyama said.

The "Zhuo Jian" forum, where the video was shown, is a speaking platform in China that invites gurus to share their thoughts with the public.