MASS OF THE FERMENTING DREGS are a Japanese post-hardcore/shoegaze rock band formed in Kobe City, Japan in 2007. Known for their guitar driven melodic sound and hair-flailing energetic live shows, they are one of the most edgy and attractive alternative rock outfits in Japan. They are also popular in Europe, with more listeners in the UK than in Japan, according to the latest Spotify statistics. They performed at ArcTanGent in Bristol, UK 2022, and this will be their first European tour.