A 57-day continuous presence is the longest since the Japanese government purchased the disputed islands.

A view from China on the treaties that apply to the territorial dispute between China and Japan.

The 2013 bilateral fisheries agreement continues to see changes.

Without substantial revisions to multilateral regimes, the Sanchi environmental crisis will not be the last of its kind.

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

The Japanese defense minister says the Chinese submarine spotted near the Senkaku islands was a Type 093 nuclear attack submarine.

An agreement this week will lead to the implementation of a long-sought hotline.

The G-7 leaders call on parties in the South China Sea to demilitarize features.

Japan claims this is the 12th incursion by Chinese vessels in the East China Sea to date this year.

Jim Mattis offers Japan reassurance on the disputed Senkaku Islands.

Trump's defense secretary will reaffirm U.S. commitments to Japan under Article V when he visits this week.

"This is China Naval Aviation Force on guard. Attention! You are about to violate Chinese air territory."

Japan says the incursion is the 31st in the East China Sea this year.

Australia, with close ties to both China and Japan, should help encourage responsible diplomacy.

"China appears to be testing opportunities on its maritime borders – where is the weak spot it can exploit?"

Historical issues and maritime disputes continue to strain relations between China and Japan.