One Ok Rock (Japanese: ワンオクロック, Hepburn: Wan Oku Rokku) (stylized in all caps as ONE OK ROCK) is a Japanese rock band, formed in Tokyo, Japan, in 2005. Originally five members, the band currently consists of vocalist Takahiro Moriuchi, guitarist and bandleader Toru Yamashita, bassist Ryota Kohama, and drummer Tomoya Kanki. Former members include drummer Yu Koyanagi and guitarist Alexander “Alex” Reimon Onizawa. They play varied styles of music, with songs ranging from alternative rock and emo to post-hardcore and pop punk.