Work to remove the oil from about 30 kilometers (18.6 miles) of coastline was going smoothly and would likely be completed in January, he said.
The vessel, chartered by Mitsui OSK Lines Ltd, ran aground on a reef in Mauritius on July 25 and began to leak oil on August 6.
The spilled oil had spread over a large area of endangered coral, affecting fish and other marine life in what some scientists have called the Indian Ocean island’s worst environmental disaster.
Nagashiki Shipping also said that the planned removal of the stern section of the ship would begin in late December and last for several months. The front section was scuttled in August on instructions from local authorities.