Supercard of Honor XII was a professional wrestling pay-per-view event produced by American promotion Ring of Honor (ROH), which took place Saturday, April 7, 2018, at the UNO Lakefront Arena in New Orleans, Louisiana. Wrestlers from New Japan Pro-Wrestling (NJPW) – with whom ROH has a partnership – also appeared at the event. Also, wrestlers from the Japan based women's promotion World Wonder Ring Stardom appeared on the show as part of the tournament to crown the inaugural Women of Honor Champion – ROH's first women's championship.