Handshake Vs. Bow?

Nov. 14, 2009: The President bows as he is greeted by Japanese Emperor Akihito and Empress Michiko as he arrives at the Imperial Palace in Tokyo (AP).

Aug. 29, 2007: Japan's Emperor Akihito greets German Chancellor Angela Merkel during their meeting in Tokyo (Reuters).

Oct. 22, 2008: India's Prime Minister Manmohan Singh and his wife Gursharan Kaur are greeted by Japan's Emperor Akihito and Empress Michiko upon their arrival at the Imperial Palace in Tokyo (Reuters).

Feb. 27, 2008: Israel's Prime Minister Ehud Olmert and his wife Aliza are greeted by Japan's Emperor Akihito and Empress Michiko at the Imperial Palace in Tokyo (Reuters).

Feb. 21, 2007: Vice President Dick Cheney is greeted by Japan's Emperor Akihito at the Imperial Palace in Tokyo (White House photo by David Bohrer).

May 9, 2008: Chinese President Hu Jintao shakes hands with Japanese Emperor Akihito at a farewell call at a hotel in Tokyo (Reuters).

Nov. 26, 2007: Vietnamese President Nguyen Minh Triet and his wife Tran Thi Kim Chi greet Japanese Emperor Akihito and Japanese Empress Michiko upon their arrival at the Imperial Palace to attend a state dinner in Tokyo (Reuters).

July 9, 2009: Ontario Premier Dalton McGuinty and his wife Terri greet Japanese Emperor Akihito during the Emperor's visit to Queen's Park in Toronto (Reuters).

Feb. 27, 2007: In this photo released by the Imperial Household Agency of Japan, Japanese Emperor Akihito greets Russian Prime Minister Mikhail Fradkov at the Imperial Palace in Tokyo (AP).