Takahiro Moriuchi , known professionally as Taka, is a Japanese singer and musician who is the lead vocalist of the Japanese rock band One Ok Rock. Moriuchi is the band's main lyricist and composer. In 2017, Kerrang! magazine placed him at number 27 on their list of the "50 Greatest Rockstars in the World". He was also listed by Rock Sound magazine as one of "50 Most Influential Figures in Rock".

One Ok Rock is a Japanese rock band formed in 2005. The band currently consists of vocalist Takahiro Moriuchi, guitarist, 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.