Change

E|--8------------7-------------5-------------5-------------| 
B|--10-----------8-------------6-------------5-------------| 
G|--9-----x2-----9------x2-----7------x2-----6------x2-----| 
D|--10-----------9-------------7-------------7-------------| 
A|--8------------7-------------5-------------7-------------| 
E|--8------------7-------------5-------------5-------------| 


there is a guitar part at the chorus, but i can't hear it over the shamisen. But if you
play this, it will sound fine.
E|---------------------| 
B|---10~~~~~~~~~~~~~~~~| 
G|---------------------| 
D|---------------------| 
A|---------------------| 
E|---------------------|