He was Polynesian and appeared to be aged in his mid to late 30s. He was wearing black shorts, a Chiefs top and a greenstone pendant.
Mr Whiu said he may have been walking with a group of others down Inlet Rd. They had been heading east, out of town.
The group stopped to help the man but didn't stay after the ambulance arrived, so police did not know who they were either.
Mr Whiu appealed to anyone in that group, or anyone else who may have seen the accident, to call Kerikeri police on (09) 407 9211.
"We'd like to speak to any witnesses, and to any and all of those who stopped to assist him," he said.
He also wanted to hear from anyone who could identify the man, or who was missing a father, a husband or a mate.
The unidentified man's death was only one of several serious incidents emergency services had to deal with across Northland overnight.
The accident closed Inlet Rd for more than an hour. With no way around motorists trying to get home had to wait until almost 3am to get through.