"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. It was released on July 13, 2016 and reached number 13 on the Oricon. It was used as the third opening for the 20th season of the anime Naruto Shippuden and the third song by Asian Kung-Fu Generation in the Naruto media, after "Haruka Kanata" and "Sore dewa, Mata Ashita". 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." Single's B-side, Hakkei, sung by band's guitarist, Kensuke Kita. This is the fourth time since Re:Re:'s B-side, "Time Traveller" in 2016.