Speaking to reporters after a meeting with Japan Defense Minister Itsunori Onodera, Hagel said their talks revolved around the threat posed by Pyongyang. He said the two ships are in response to North Korea's "pattern of provocative and destabilizing actions, including missile launches" that violate UN resolutions.
Hagel said the ships also will provide more protection to the US from those threats.
The announcement came as tensions with North Korea spiked again, with Pyongyang continuing to threaten additional missile and nuclear tests. North and South Korea fired hundreds of artillery shells into each other's waters in late March in the most recent flare-up.
The two additional ships would bring the total to seven US ballistic missile defense warships in Japan, and it continues US efforts to increase its focus on the Asia Pacific.
Hagel is on a 10-day trip across the Asia Pacific, and just spent three days in Hawaii meeting with Southeast Asian defense ministers, talking about efforts to improve defense and humanitarian assistance cooperation. Japan is his second stop, where he said he wants to assure Japanese leaders that the US is strongly committed to protecting their country's security.
Hagel said the US wants the countries in the region to resolve the disputes peacefully. But he added that the United States would honor its treaty commitments.
Last October, the US and Japan agreed to broad plans to expand their defense alliance, including plans to position a second early warning radar there by the end of this year. There is one in northern Japan and the second one would be designed to provide better missile defense coverage in the event of a North Korean attack.
