Two Marines were rescued after the incident but one was declared dead. A conclusion has not yet been reached on the details of the situation, according to the US 3rd Marine Expeditionary Force.
"Closely cooperating with Donald, I'm determined to further strengthen the bond of the Japan-US alliance and work together to secure peace and stability in the region", Abe said in the message.
"The loss of the outstanding members of U.S. Marine Corps is my deepest regret, and I myself and the Japanese people share deep sorrow of the American people", Abe said.
"I am incredibly proud of and grateful for the efforts of the us military along with our Japanese and Australian partners", Martinez added.
"All of us in the Sumo family are extremely saddened following the announcement of the conclusion of search and rescue operations", Lt. Col. Mitchell Maury, commander of Marine Aerial Refueler Transport Squadron 152, said in the statement. "We know this hard decision was made after all resources were exhausted in the vigorous search for the Marines". "I ask that you please keep the families and friends of these Marines in your thoughts during this incredibly hard time". Among the missing is Carter Ross, an air crewman of the KC-130 refuel plane that was involved in the collision.
A multinational effort to find survivors included U.S., Japanese and Australian aircraft and U.S. and Japanese ships.
In December 2016, a U.S. Marine Osprey aircraft was wrecked during a nighttime air-to-air refueling exercise in the southern Japan prefecture of Okinawa.