Japanese television showed extensive damage to the Fitzgerald, which the Navy said had taken on water but was still capable of moving under its own power. The other vessel, the container ship ACX Crystal, appeared to have sustained somewhat less damage. There were no immediate reports of injuries on the Crystal.

On Saturday, the Seventh Fleet said the Fitzgerald had made its way back to a naval base.

The Fitzgerald’s hull was partly caved in on its starboard, or right-hand, side, while the Crystal showed deep gashes in its bow. The pattern of damage suggested that the Crystal — a much larger vessel, laden with shipping containers — had collided nose-first with the Fitzgerald’s side.