"Shunkan Sentimental" was certified platinum by the Recording Industry Association of Japan in January 2016 for selling over 500K digitally! The song sold 20K on its release day back in January 2010, then cerified gold (100K+ sales, digitally) in April 2010.

The band's only other certified song is "Shoujo S" which was certified gold (100K+ sales, digitally) in August 2009.

Physical sales for comprasion:

* "Shunkan Sentimental" 32,624
* "Shoujo S" 33,881