This year's Keen Sword exercise features a focus on amphibious operations.

Denny Tamaki’s opposition to the U.S. military presence in Okinawa adds a new chapter to the Futenma relocation dispute. 

The incident was caught on tape by a Japanese television network.

In uncertain times, Japan will have to invest more energy in a long-standing partnership.

Japan is going electromagnetic, with implications for Japanese security policy and the U.S. regional strategy.

The announcement contrasts with long-term moves to increase Japan's missile defense capabilities.

Japan's goals -- maintaining the U.S.-Japan alliance and upholding the liberal international order -- have never been more at odds.

Japan, in particular, was likely encouraged.

With the June 12 summit in Singapore cancelled, what lies ahead for the Korean Peninsula?

This year's Diplomacy Bluebook shows Japan scrambling to square long-held positions with rapid changes in the region.

After a series of U.S helicopter safety mishaps, plans to inspect the U.S. marine base have been met with resistance.

The early years of the U.S.-Japan alliance in the post-war era were rocky.

Looking beyond short-term crises to the long-term implications for the U.S.-Japan alliance.

Japan activates its equivalent of a marine unit for the first time since World War II.

Interest in the radar is spurred by increasing Chinese military activity in the western Pacific Ocean.

Tokyo has serious concerns about the U.S.-North Korea dialogue and also the potential of nuclear war.