The first a-side song "Kamen" was used as the theme song for the Japanese version of the movie Mask 2. The other a-side song "Mirai Kōkai" was used as the ending theme song for the anime One Piece.
I'll be a flower of the summer flames
Putting on a golden, golden mask
Taking in the sun straightforwardly
With dazzling eyes, dazzling eyes, and passion that stabs the sky
Someday, I'll be the sky
So that I can bluely, bluely dissolve
If I continue to believe in a new world, in my heart, in my heart
The lies, sadness, and clouds will clear away[1]
As of June 2005, "Kamen / Mirai Kōkai" has been certified gold for shipments of over 100,000 by the Recording Industry Association of Japan.[2]