The hottest buzzwords in politics these days are "the right of collective self-defense," now that Prime Minister Shinzo Abe's advisory panel on security has released its much-awaited recommendations for reinterpreting the Constitution.

The Japanese people have been engaged in heated debate as Abe works eagerly to achieve a historic policy shift that would allow Japan to exercise this right, which he says would strengthen the Japan-U.S. military alliance.

But what is the right of collective self-defense? Why is Abe pushing so hard for the change?