X Japan is one of the biggest metal bands to come out of Japan. They are one of the founders of the Visual Kei movement in the 80s and are one of the first. Mar 1, 2017 X Japan are Japan's biggest, loudest secret. The speed metal group, famed for their visual kei aesthetic, have sold 30 million albums. Oct 21, 2016 NEW YORK – X Japan would have been hard-pressed to imagine a more impassioned following in its heyday, with the symphonic metal.