The incident comes as Japan and China agreed to expedite talks on a East China Sea air and sea communication mechanism.

The two sides hope finding common ground on economic issues can help continue a thaw in relations.

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

Last week, the Chinese Air Force conducted military drills in the South China Sea and Western Pacific.

The 2013 bilateral fisheries agreement continues to see changes.

Beijing’s growing might continues to stoke regional anxieties.  

Move part of Japanese fortification of first island chain against Chinese fleets.

Amid a growing Chinese naval presence, Japan is considering additional steps to protect Miyako Strait.

U.S. freedom of navigation operations aren't just about China and the South China Sea.

Why did the People's Liberation Army-Navy send a submarine to the disputed islands?

U.S. Secretary of Defense will likely visit China in the first half of 2018.

The incident tests the waters in the East China Sea after a diplomatic breakthrough between the two countries.

The incident is the first of its kind in 2018.

What are the issues and flashpoints that will come to define Asia in 2018?

For the first, Chinese military aircraft flew through the Tsushima Strait which lies between Korea and Japan on Monday.

The Chinese bombers and support aircraft aimed to “test real combat capabilities.”