US President Barack Obama on Monday, April 28, 2014 amends his statement and gave his word of Commitment on defending Philippines.
Monday night as US pres. Barack Obama said that the "United States' commitment to defend the Philippines is IRON-CLAD"
This is after the US President failed to say actually on US will not commit against China, earlier at the joint press conference with President Benigno "Noynoy" Aquino, Obama did not gave his commitment that the US would defend Philippines from China attacks it over maritime disputes int the West Philippine Sea.
“Through our treaty alliance, the United States has an ironclad commitment to defend you, your security and your independence,” -Obama said during the state dinner prepared for him at the Malacañang Palace
Japan is just like the Philippines a treaty ally of the United States (US), and both have a maritime disputes against china.
Japan has the Senkaku Islands while the Philippines have the West Philippine Sea.