TRI4TH started its activities in 2006 and made its debut in 2009 with an analog single titled "TRI4TH plus EP" released on Tatsuo Sunaga's label, "DISC MINOR."
In recent times, within the ever-evolving J-JAZZ scene, they have been breaking new ground and are considered one of the most promising and noteworthy jazz bands with a combination of skill and experience that is currently at its peak.