Collective Self-Defence in Japan?

http://nationalinterest.org/feature/collective-self-defense-japans-future-10491


This is a very hard topic to decide which one is right.
Traditionally, many Japanese citizens think not involving in any conflict is the idea of pacifist and that idea can be still right even now.

However, to me, the current situation is too unbalanced becase the US can carry out its collective self-defence for Japan but Japan cannot do it for the US. From that perspective, Japan would be so selfish that it cannot create good relations with the U.S..

I hope the Japanese government will do a right choice to protect ourselves and establish trustworthy relations with the US.