Soran Bushi is a traditional sea shanty performed with koto and shamisen. Here is the standard version:
theres an interesting modern story that goes along with the song, kind of like ‘stand and deliver’ meets ‘a chorus line’ meets ‘the mighty ducks’. here is a link that explains it
http://mutsudaiko.org/nanchusoran.html
(if link doesnt work try http://webcache.googleusercontent.com/search?q=cache:MErirZHdrvkJ:mutsudaiko.org/nanchusoran.html+&cd=1&hl=en&ct=clnk&gl=us )
and here is the dance!
if anyone has tabs id be interested ! either the traditional or modern version