I presume rescue/recovery efforts began on 1 Jan (if not why not)?
"According to the companion, the accident would have happened at 11:10am on the 1st Jan. "
"A mixed team of Hokkaido Police and Niseko ski patrollers did the search and rescue operation on the 2nd. "
"The victim has been found unconscious and CPA in the bowl at 950m at 10am on the 2nd Jan, 60cm under the surface"