Tokyo's Chief Cabinet Secretary Yoshihide Suga said Thursday the Japanese government plans to receive confirmation from the United States of its commitment to defend Japan in accordance with Article 5 of the U.S.-Japan Security Treaty.
Article 5 states that an armed attack against either Japan or the United States would be confronted jointly "in accordance with constitutional provisions and processes."
Abe is seeking a consensus on the clause, and its applicability to potential attacks against the Senkakus, also known as the Diaoyutai Islands in China.
More ships of Chinese origin are sailing in the waters surrounding the disputed territory, since the Japanese government nationalized three of the five uninhabited islands in 2012.
A total of 121 Chinese vessels sailed near the disputed islands without Japan's permission in 2016.
Beijing also dispatched 10 strategic bombers and other military aircraft into airspace claimed by Japan and South Korea on Jan. 9, South Korean newspaper JoongAng Ilbo reported.
Suga said the defense cooperation on the Senkakus will be confirmed on Friday during U.S. Defense Secretary James Mattis' visit to Tokyo.
On Tuesday, Abe had told Japan's House of Representatives' budget committee that Article 5 of the treaty is "very important" and that he intends to reconfirm U.S. military commitment during the summit, to be held on Feb. 10.
A joint statement that was issued after the United States and Japan held summit talks in 2014, confirming defense cooperation on the Senkaku Islands, generated strong opposition from China, according to the JoongAng.