"Blood Circulator" (ブラッドサーキュレーター, Buraddo Sākyurētā) is a song by Japanese rock band Asian Kung-Fu Generation.

Masafumi Gotō said, "The offer came to places where there was no song, no idea, no time, but I could not find a reason to refuse, I thought that I had to write down even while I was sleeping.

"[2] Single's B-side, Hakkei, sung by band's guitarist, Kensuke Kita.

The music video for "Blood Circulator" was directed by Masaki Ōkita.

[3] At the beginning, video presented in black and red, with the band playing in a building.