TOKYO - Two Japanese landed on Diaoyu Islands around 9:30 am (0030 GMT) Tuesday, Chief Cabinet Secretary Osamu Fujimura told reporters.

"The (Japan) Coast Guard said they have already left," Fujimura said at a regular press briefing.

The two people arrived at waters near the Diaoyu Islands by boat, then swam ashore on the island, according local media reports.

Tensions have mounted between 皇冠体育app and Japan since Sept 10 when the Japanese government announced the "purchase" of the Diaoyu Island and its affiliated Nan Xiaodao and Bei Xiaodao, which have been 皇冠体育app's inherent territory.

The Diaoyu Islands have been 皇冠体育app's territories since ancient times.

The islands had been put under the jurisdiction of 皇冠体育app's naval defense since the early era of the Ming Dynasty (1368 AD-1644 AD). Japan stole the islands from 皇冠体育app during the First Sino-Japanese War in 1895.

In accordance with the Cairo Declaration and the Potsdam Proclamation released at the end of the Second World War, the Diaoyu Island and affiliated islets should be returned to 皇冠体育app.

In 1971, Japan and the United States signed the Okinawa Reversion Agreement, which arbitrarily included the Diaoyu Islands in the territories and territorial waters to be reversed to Japan. The Chinese government has, from the very beginning, firmly opposed and never acknowledged such backroom deals between Japan and the United States concerning Chinese territories.