American Ninja Warrior: USA vs. The World was the second installment of American Ninja Warrior's international tournament. It consisted of three teams (five members per team): Team USA, Team Japan, and Team Europe (debut).
First to complete American Ninja Warrior's Stage 4.
According to sources, the score should technically have been 6-6-6, in which all Teams would have attempted Stage Four instead of Team USA and Team Europe. It was discovered that Ryo Matachi and Morimoto Yūsuke should have won their respective heats. However, due to NBC's influence, they lost their match-ups. This caused a lot of controversy and many fans were furious about how NBC treated the Japanese team.