The network was left red-faced by the comments of former journalist Joshua Cooper Ramo, who worked as a commentator during coverage of the opening ceremony of the Winter Olympics in PyeongChang.
The analyst, Joshua Cooper Ramo, made the comment while appearing with Katie Couric and Mike Tirico during the opening ceremony on Friday.
Japan ruled Korea with an iron fist from 1910 to 1945 in a bloody occupation that still strikes a raw nerve.
Ramo, who has written books on China and is a director of Starbucks Corp and FedEx Corp, said as athletes paraded into the Games stadium that "every Korean will tell you that Japan is a cultural, technological and economic example that has been so important to their own transformation".
NBC issued an apology for Ramo's comment before later announcing his assignment at the Olympics is now over.
His incorrect and insensitive comment about Korea's history has enraged many of its people.
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The Korea Herald: "Some say it's questionable whether Ramo has been even following the news leading up to the current Olympics, as some of the disputes between South Korea and Japan erupted even during the preparation phase of the games".
At the time of Mr Abe's apology, South Korean president Park Geun-hye said: Most of victims are at an advanced age and nine died this year alone. While the Japanese government has expressed remorse and set up a fund in the 1990s to help victims it once referred to as "comfort women", some politicians and academics claim that estimates of 200,000 sex slaves are exaggerated.
Soon after Mr. Ramo's remark, an online petition began to circulate demanding an apology from NBC.
AMERICAN TV network NBC was forced to fire one of its Olympic analysts after he inexplicably said Koreans are grateful for Japan's role in their economic development - while ignoring the one-time imperial power's brutalisation of the peninsula.
NBC, a unit of Comcast Corp, is the exclusive USA broadcaster of the Olympics and is producing more than 2,400 hours of coverage over 18 days from Pyeongchang.