There are three bands/artists that go by the name Sour, one Japanese, one American and one Romanian. For the American please fix your tags to SöuR!!!
I.
Sour is a 3-piece band formed in the spring of 2002 in Japan. Members are hoshijima (GUITAR/VOICE) of French birth and British growth, Sohey (BASS/UPRIGHT BASS) of Ginza birth and Ginza growth, and KENNNNN (DRUMS/TOYS) of German birth and Spanish growth. They describe their sound as "organic, urban, tight, mellow, sharpened, and totally comfortable". They have four releases so far: Read more on Last.fm