Shinsuke Nakamura's t-shirt that was released on 5/2 in Japan has already sold out. All sizes sold out in just a few hours. His t-shirts are also among the best-selling items on WWEShop.com behind The New Day's "Booty-O" shirts. That's very impressive when you consider that Nakamura's TV exposure is limited to WWE Network programming.
WWE's upcoming tour of Japan in July sold out within 5 minutes. Nakamura and Asuka will be wrestling on those shows.
His official theme "The Rising Sun" was the first WWE theme to reach 1 million views on YouTube. As of this writing, the theme is approaching 1.5 million YouTube views. At one point, the song was listed as the number 1 soundtrack on the iTunes charts.
Hopefully, WWE realizes that they have a genuine top level star on their hands and he is treated as a big deal when he moves up to the main roster. The New Day is being pushed, in part, because of their merchandise sales.
If you haven't done so, check out Nakamura's theme below: