Japanese Chief Cabinet Secretary Yoshihide Suga said Tuesday that Japan and the United States will impose tougher financial sanctions against the Democratic People's Republic of Korea (DPRK).

Suga said at a press conference that visiting U.S. Under Secretary for Terrorism and Financial Intelligence at Department of the Treasury David Cohen has achieved agreement with Japanese officials from foreign and financial ministries on the move.

Suga said Japan will gradually implement UN resolutions and is mulling to impose same sanctions by the United States against the DPRK.

In a separated press conference the day, Japanese Defense Minister Itsunori Onodera said Japan will closely monitor the DPRK, which said it will launch preemptive nuclear attack against the United States and Japan.

The U.S. government imposed unilateral financial sanctions on a DPRK bank and four officials, accusing them of involving in DPRK's plans of nuke and missile development.

The UN Security Council on March 7 unanimously adopted a resolution, demanding the DPRK not to proceed with any further nuclear test, give up any nuclear arms program and return to the nuclear Non-Proliferation Treaty.