certificate, Naito nominated Tomohiro Ishii as his first challenger for it due to Ishii defeating him not only during the 2017 G1 Climax, but also during the IWGP United States Heavyweight Championship tournament in July. The match was officially announced for King of Pro-Wrestling on August 21. The rest of the matches for the show were announced on September 25, the day after Destruction in Kobe. Added were title matches for both of NJPW's junior heavyweight titles. In the IWGP Junior Heavyweight Championship match, Kushida would defend the title against Will Ospreay. After successfully defending the title against El Desperado on September 16 at Destruction in Hiroshima, Kushida was approached by Ospreay, who stated that he was being defined as the man who could not beat Kushida and wanting to change that perception, challenged him to a title match. This was followed by Hiromu Takahashi entering the ring, but before he could make his own challenge, he was knocked out by Ospreay. Ospreay had been defeated by Kushida in all four of their previous matches against each other, including the finals of the 2017 Best of the Super Juniors and What Culture Pro Wrestling's 2017 Pro Wrestling World Cup tournaments, as well as two IWGP Junior Heavyweight Championship matches, which took place on April 10, 2016, at Invasion Attack 2016 and June 19, 2016, at Dominion 6.19 in Osaka-jo Hall. In the IWGP Junior Heavyweight Tag Team Championship match, Funky Future (Ricochet and Ryusuke Taguchi) were set to defend the title against the mystery team known only as "Roppongi 3K". After dissolving his Roppongi Vice tag team with Beretta on September 16, Rocky Romero approached Ricochet and Taguchi after they had successfully defended the IWGP Junior Heavyweight Tag Team Championship against Taichi and Yoshinobu Kanemaru and announced he was bringing in a new team to challenge them for the title. Heading into the title match, the identities of Roppongi 3K were kept secret. The IWGP Tag Team Championship was to be defended in a three-way tornado elimination match, where the defending champions Killer Elite Squad (Davey Boy Smith Jr. and Lance Archer) would face the Guerrillas of Destiny (Tama Tonga and Tanga Loa) and War Machine (Hanson and Raymond Rowe). The three teams faced off in three separate three-way title matches during the previous Destruction tour; the first two matches were won by the defending champions War Machine, while the