"Fukyōwaon" (不協和音, Discord) is the 4th single by Japanese idol girl group Keyakizaka46. It was released on 5 April 2017. It reached number-one on the weekly Oricon Singles Chart with 632,667 copies sold. It was also number-one on the Billboard Japan Hot 100. "Fukyōwaon" is a Japanese word that means "dissonance." The center (choreography center) position in the title track is held by Yurina Hirate.