2001–2004: Career beginnings and other musical pursuits Taka signed with
Johnny's Entertainment in August 2001 at age 13. He joined as a trainee in the group called
Johnny's Junior and made some singing appearances on Japanese music shows during this period. In September 2003, two years after joining the agency, Taka was one of the Johnny's Juniors chosen to be part of the idol group
NEWS. However, his activities were suspended when he left the agency and the group in December of the same year. He was briefly in the
cover band Chivalry of Music in 2004, comprising a keyboardist, guitarist, and himself on vocals.
2005–present: One Ok Rock Taka was invited by guitarist
Toru Yamashita to join
One Ok Rock in 2005. They later performed together at the music festival, Punkspring 2013 in Tokyo, Japan. In November 2013, Taka helped
Pay Money to My Pain to sing and write one of their songs on their tribute album
Gene after their vocalist, K (後藤慶, Kei Gotō), died due to
heart failure. In summer 2014, One Ok Rock's newest songs, "
Mighty Long Fall" and "Heartache" were featured as theme songs for the live action movie sequels,
Rurouni Kenshin: Kyoto Inferno and
Rurouni Kenshin: The Legend Ends, respectively. In February 2015, Moriuchi was featured as a guest vocalist on the track "Dreaming Alone" by
Against the Current. As of July 2015, One Ok Rock is signed with the U.S. label,
Warner Bros. Records and released an English version of their album,
35xxxv in February 2015. On September 11, 2016, One Ok Rock signed with
Fueled by Ramen. Their eighth album,
Ambitions, was released on January 11, 2017, for the Japanese version album under the Japanese label A-Sketch and on January 13, 2017, for the English version album under the American label Fueled by Ramen. In July 2017, Moriuchi was featured on the track "Don't Let Me Go" from
Goldfinger's album
The Knife as a guest vocalist. On 27 October 2017, he appeared at
Linkin Park and Friends – Celebrate Life in Honor of Chester Bennington, performing "
Somewhere I Belong" with the remaining members of
Linkin Park. On May 12, 2018, he guested on Linkin Park co-vocalist
Mike Shinoda's show at
Identity Festival in Los Angeles, performing "
Waiting for the End /
Where'd You Go" mash-up. On September 14, 2020,
Journey frontman
Arnel Pineda collaborated with him covering the 1981 Journey classic ballad "
Open Arms". The cover was recorded separately in isolation, and uploaded on Pineda's YouTube channel. In 2025, the he contributed to the original soundtrack of the
Netflix original series
Glass Heart in 2025. ==Artistry==