Thanks for bringing this up. I grew up listening to blue grass. When I saw the title "Japanese Blue Grass band", I didn't think it could be very good. These boys are dang good. I'll have to watch more of them on YouTube.
The Japanese Bluegrass Band will be coming back to Alabama on June 10th. This band is known for nice rhythms and tempos, which they are able to achieve with the help of banjo players and base fiddlers. Their leader is Mr. I and Mr. O is the base fiddler in the band.