Rockin'On Japan, often stylized in all caps, is a monthly magazine that covers the Japanese music scene and various cultural events in Japan, such as art venues and culinary expos.

The magazine was founded in 1972, and focused on providing news that was thoroughly sourced and fact-checked, while also providing content without censorship and on original news stories.

The magazine later, in 1986, split into versions that served Japan domestically, re-titled to Rockin'On Japan, and that covered international music content, titled Rockin'On.

[1] The other large festival created and sponsored by the magazine is named Countdown Japan and the two festivals make up the promotion arm of the magazine's focus on Japanese music.

The style of music produced and sponsored by the magazine has been commonly referred to as Rockin’On-kei and represents a "faintly progressive, watered-down alternative rock arrangements with soaring J-pop vocal melodies, delivered with impressive technical virtuosity".