Sign (Flow song)
{{Infobox song
| name = Sign
| cover = FLOWSignReg.jpg
| alt =
| type = single
| artist = FLOW
| album =
| released = January 13, 2010
| format =
| recorded =
| studio =
| venue =
| genre = {{flatlist|
| length =
| label = Ki/oon Records
| writer = Takeshi Asakawa
| producer =
| prev_title = Snow Flake ~Kioku no Koshitsu~ / Pulse
| prev_year = 2008
| next_title = CALLING
| next_year = 2010
}}
Sign is FLOW's eighteenth single. Its A-Side was used as the sixth opening theme song for Naruto Shippuden. 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. It reached number 4 on the Oricon charts in its first week and charted for 6 weeks.{{cite web|title=Oricon Profile|url=http://www.oricon.co.jp/music/release/d/849549/1/}}
Track listing
{{tracklist
| title1 = Sign
| length1 = 3:58
| title2 = Nowhere ~Kimi ni Okuru Orera Nari no Ouenka~ (君に贈る俺らなりの応援歌))
| length2 = 4:12
| title3 = Bring it on! -Reggaeton Mix-
| length3 = 3:09
| title4 = Sign -NARUTO Opening Mix-
| length4 = 1:33
| title5 = Sign -Instrumental-
| length5 = 3:54
}}
Limited edition track listing
{{tracklist
| title1 = Sign
| length1 = 3:58
| title2 = Nowhere ~Kimi ni Okuru Orera Nari no Ouenka~ (君に贈る俺らなりの応援歌))
| length2 = 4:12
| title3 = FLOWxNARUTO -Time machine Special Mix-
| title4 = Sign -NARUTO Opening Mix-
| length4 = 1:33
| title5 = Sign -Instrumental-
| length5 = 3:54
}}
Bonus DVD track listing
{{tracklist
| title1 = Sign (MUSIC VIDEO)
| title2 = Sign (NARUTO Mix Ver.) (MUSIC VIDEO)
| title3 = Sign (Making-of)
}}