King of Pro-Wrestling (2015) was a professional wrestling pay-per-view (PPV) promoted by New Japan Pro Wrestling (NJPW). The event took place on October 12, 2015, in Tokyo at Ryōgoku Kokugikan. The event was NJPW's biggest event between August's G1 Climax and January's Wrestle Kingdom 10 in Tokyo Dome and was main evented by Kazuchika Okada defending the IWGP Heavyweight Championship against A.J. Styles. All in all, the event featured nine matches, four of which were contested for championships. In addition to airing worldwide through NJPW's internet streaming site, New Japan Pro Wrestling World, the event also aired in Japan as a regular PPV through SKY PerfecTV!. This marked the first ever event on NJPW World to feature English commentary, provided by Kevin Kelly and Matt Striker. It was the fourth event under the King of Pro-Wrestling name.

King of Pro-Wrestling featured nine professional wrestling matches that involved different wrestlers from pre-existing scripted feuds and storylines. Wrestlers portrayed villains, heroes, or less distinguishable characters in the scripted events that built tension and culminated in a wrestling match or series of matches.