An Indonesian submarine has gone missing with 53 crew members.
Ships and aircraft from both strike groups coordinated operations in international waters.
The U.S. Navy said the carrier strike group was in the South China Sea to conduct routine operations "to ensure freedom of the seas".
The Theodore Roosevelt Carrier Strike Group sailed with the Nimitz Carrier Strike Group in the South China Sea, angering China.
Elbit Systems have been awarded a contract to supply an undisclosed number of light tanks to an undisclosed country in the Asia-Pacific region.
The strike group is conducting maritime security operations, say the U.S. Navy.
Minister Iwaya reiterated that the warship would not be an "attack aircraft carrier" capable of offensive military operations, although it's hard to see how that distinction can be made.
The U.S. State Department has cleared the sale of 105 F-35 jets to Japan. The authorisation is for 63 F-35As and 42 F-35Bs.
B-1B Lancers returned to the Indo-Pacific region to conduct bomber task force operations, say the U.S Air Force.
The Theodore Roosevelt Carrier Strike Group and the America Expeditionary Strike Group joined forces to conduct Expeditionary Strike Force operations in the Pacific.