Coupang, South Korea's largest online retailer described as the country's Amazon.com, has apologized for a data breach impacting 34 million customers.

Coupang, dubbed the Amazon.com of South Korea, is the country's top online retailer with its services ubiquitous for many Koreans using its "Rocket" fast deliveries.

Coupang, South Korea's equivalent of Amazon.com, is the latest major company in the country to suffer a breach.