Oricon’s accumulated annual sales chart over the period from 2010 to 2015 for kpop artists shows TVXQ!/Tohoshinki at the top with 24,535 million yen!

They are still the top even if you count their accumulated annual sales from when they came back as duo, too (2011~).
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Credits:
the qoo.net,
Posted and Shared by TVXQ! Express