Rapid Fire King(連射王) is a novel written by Kawakami Minoru (川上 稔). It began as a never-completed web novel on Kawakami's website, was completed and released as a two-part novel by Media Works in 2007, and was re-released as a light novel by Dengeki Bunko in 2013. It takes place in Forth, the first era of Kawakami's light novels, which include Kyoukai Senjou no Horizon and Owari no Chronicle.