MASS OF THE FERMENTING DREGS is a Japanese alternative rock band formed in Kobe City, Japan.  In 2007, they won the best artist of EMI Music Japan’s new comer audition and recorded their songs with Dave Fridman at Tarbox road Studio in USA. After they released their 1st album in 2008, they rapidly climbed the alternative-rock ladder in Japan. The band once paused their activities in 2012 then reunion in 2017. The current lineup consists of Natsuko Miyamoto (Vocal & Bass) , Naoya Ogura (Guitar & Backing vocal) and Isao Yoshino (Drums & Backing vocal). 

Known for their energetic, hair-flailing live shows and melodic, guitar driven pop sound, they are still one of the most exciting and attracted act in Japan.