"I represent those who fought," Harawira said.
Harawira was a leader of the anti-tour Patu Squad. He said he traveled to most of the games in 1981 to protest and was one of the people who invaded the field in Hamilton.
"I'm proud of what New Zealand did. It was a watershed moment," Harawira said. "Nelson Mandela himself said, when he heard they'd called the game off in Hamilton, that it was like the sun had come out."
"He was a great man, one of the greatest men," Harawira said.
As he is not part of an official delegation, Harawira does not know what to expect once he arrives at the Johannesburg funeral, which is expected to be attended by nearly 100,000 people including many world leaders.
"I might just line up and try to get a ticket like everybody else," Harawira said.