A collective that grew out of participants in a cypher (an impromptu rap session in a circle) that was held on the pedestrian bridge of Umeda Station in Osaka.
Many members have achieved brilliant results in rap battles, and R-Rated has produced rappers from all over the country.

There is no hierarchy, there is no leader, and there has been no talk of forming the group.
It is characterized by the fact that it is a gathering of individuals and not a group.