King of Pain (因果応報, Ingaōhō) is the twenty-third studio album by Japanese heavy metal band Loudness.

It was released on May 19, 2010 only in Japan and marks the full-length debut of drummer Masayuki Suzuki.

Guitarist Akira Takasaki would later say King of Pain was focused on featuring Suzuki.

[1] The album reached number 21 on the Oricon chart.

[3][unreliable source] All music written by Akira Takasaki, lyrics as indicated