The man of excquisite taste pushes Katanagatari like mad, and succeeds: I'm sold.

Initially, Katanagatari seems formulaic: find the sword that gives the episode its name; learn the history of the sword’s owner; get the sword. Then comes episode four, in which we get to know Shichika’s frail and terrifying sister Nanami a little better. (Those poor, pathetic, murderous ninjas — they never had a chance.)

ANN says that every episode has its own ED theme.