US President Barack Obama (2nd L) holds talks with Japanese Prime Minister Shinzo Abe (1st R) at the Akasaka guesthouse in Tokyo, April 24, 2014. Visiting US President Barack Obama and Japanese Prime Minister Shinzo Abe on Thursday vowed to enhance bilateral ties and agree to continue their talks on the U. S.-led Trans-Pacific Partnership (TPP) free trade talks. (Xinhua)

US President Barack Obama (L) shakes hands with Japanese Prime Minister Shinzo Abe (R) at the Akasaka guesthouse in Tokyo on April 24, 2014. Visiting US President Barack Obama and Japanese Prime Minister Shinzo Abe on Thursday vowed to enhance bilateral ties and agree to continue their talks on the US-led Trans-Pacific Partnership (TPP) free trade talks. (Xinhua)

US President Barack Obama (L) attends a press conference with Japanese Prime Minister Shinzo Abe (R) at the Akasaka guesthouse in Tokyo on April 24, 2014. Visiting US President Barack Obama and Japanese Prime Minister Shinzo Abe on Thursday vowed to enhance bilateral ties and agree to continue their talks on the U. S.-led Trans-Pacific Partnership (TPP) free trade talks. (Xinhua)