X4 came together in 2015 around Yuya Matsushita, a multi-talented actor and established solo artist. First album "XVISION" is released, quickly reaching #1 on the iTunes Japan R&B chart as an indie. The group embarked on their first tour, "X4 LIVE TOUR 2015 ‒XVISION-", playing 20 venues and following it up with their single "Koe ni shinagara" going straight to #1 on the iTunes R&B chart. Next single, "Killing Me", shot to #1 on the R&B charts and saw the group finishing up 2015 with the ~Killing Me~" tour. In 2016, singles "obsession" and "IDKYN（I don't know your name）" made it to #1 on the iTunes R&B chart. First major album "Funk,Dunk,Punk" then climbs the weekly album charts to #10. In the same year mini album "4 MY BABY" makes it to #4 on the daily ranking. In May of 2017, the group performed to a sold-out audience at FANIMECON 2017 in the U.S., and in October new album "XTIME" was released, hitting #1 on the iTunes R&B / Soul chart. Yuya and Kodai are releasing solo singles fall 2018, leading up to X4's latest album coming out in early 2019.