Prediction: Japan will drive Nintendo Switch sales and sell more in the region than in the U.S.

[StarDoor]

This prediction is not backed up by sales data. Switch is significantly ahead of 3DS in the US and slightly behind 3DS in Japan.

By the end of November 2011, 3DS had sold 200 thousand units more in Japan than in the US.
By the end of November 2017, Switch had sold 1 million units more in the US than in Japan.