The striker had hinted he would retire from the international scene before the World Cup but stuck around for his countrys ultimately unsuccessful campaign.
“For me it's a farewell on the same continent it all started," he said to the BBC.
"It probably didn't end well for us in this tournament, nevertheless I'm happy with all I've done for the national team," he added.
Nigeria dropped out of the tournament after losing their group matches against Argentina and Greece before finally drawing 2-2 with South Korea.
The Nigerian said he was proud to have worn the colours of his national team and will remember playing for the Super Eagles fondly.
"I've really enjoyed myself and it was emotionally important for me to play in front of my family," he stated.
"I've won the [under-17] World Cup, the Olympic gold and Nations Cup silver and bronze medals.
"We haven't achieved much as a team but personally I think it's an achievement I am proud of.
"My wife was here [in Durban] to watch me, I played in front of my kids at the biggest football tournament, so what else can I ask for."
Kanu, who was African Footballer of the year in 1996 and 1999, went on to say he will continue playing club football.No trip to South Africa is complete without a visit to its most beautiful and sunniest city. Durban offers much more than sandy beaches, safaris, casinos and the World Cup, for information on what to do and see, please click here.