The parents of Formula One driver Jules Bianchi say he has been taken out of an artificial coma and repatriated from Japan to a French hospital.

Bianchi, who crashed during last month's Japanese Grand Prix, remains in a critical condition with severe head injuries, his parents said in a statement.

The 25-year-old Bianchi lost control of his Marussia car and hit a mobile crane that was inside the trackside barriers.

Although Bianchi remains unconscious "he is breathing unaided and his vital signs are stable," the statement said, adding that he was transferred overnight from Yokkaichi to a hospital in his home city of Nice, in southern France.