Only a few months ago, the Japan-U.S. military alliance — considered by both nations as the "cornerstone" of peace and security in the Asia-Pacific region — was in crisis.

But owing to a wakeup call in the East China Sea — military tensions with Beijing — Japan is taking a fresh look at the role of the U.S. military in the country.

The tension with China has led people in Japan to acknowledge the strategic importance of having U.S. forces based here, not only for the defense of Japanese territory but also to maintain stability throughout East Asia.