Star-X

 is a collaboration unit between One-X and 12 Seizarium formed on March 30, 2021.

Current Members

 * 12 Seizarium
 * Moriyama Tsuduri (森山綴)
 * Manato.
 * Kawahara Junta (河原隼大)
 * Matsuda Taiki (松田大輝)
 * Fujisawa Tomoya (藤澤智也)
 * Suzuno Hayato (涼野ハヤト)


 * One-X
 * Haitsuka Soushi (灰塚宗史)
 * Yamazaki Taiga (山崎大雅)
 * Kondo Takuma (近藤拓馬)
 * Ara Kazuharu (荒一陽)
 * Ishimoto Koki (石本航輝)
 * Hozumi Sota (穗積颯太)
 * Komuro Shouma (小室翔真)