The Wrestle-1 Championship was the top professional wrestling title owned by the Wrestle-1 (W-1) promotion. In Japanese the title's name includes the katakana term for "championship", Chanpionshippu (チャンピオンシップ), derived from the English language instead of the more common kanji term Ōza (王座). The title also does not feature the word "Heavyweight" or any other weight class, indicating an open-weight status de facto.

Wrestle-1 was a Japanese puroresu or professional wrestling promotion, founded in July 2013 by Keiji Mutoh following his resignation from All Japan Pro Wrestling (AJPW). The core of the promotion's roster was formed by wrestlers loyal to Mutoh, who left AJPW in a mass exodus during June 2013. Mutoh served as the promotion's first president and the head of its parent company, kabushiki gaisha named GEN Sports Entertainment. In March 2017, Kaz Hayashi took over as the new president of Wrestle-1. The promotion held its first event on September 8, 2013, at Tokyo Dome City Hall.