I come from korean arts hence the user name. And the highest ranks that one can get in those arts are 9th or 10th. But when one looks at the ranks of the bujinkan and myabe the other ninja schools. There is 10th through 15th dan or higher is there an end to the ranks. I know that Soke is the highest and he can make as many ranks as he wants to. Like 125th dan. I was wondering why so high ranks. Couldn't more things be tought at each rank. I am not in anyway trying to bash the art. I am just trying to understand what s going on there.