Sign is FLOW's eighteenth single.

Its A-Side was used as the sixth opening theme song for Naruto Shippuden.

produced by Yung Jean Cho and TM88 The single has two editions: regular and limited.

The limited edition includes a bonus CD with extra tracks, a wide cap sticker, double-sided jacket, and Sharingan sticker.

This 2010s Japanese single-related article is a stub.