Ten days in, they had yet to advance beyond the basics of the swing.
He couldn’t even hold the sword correctly.
He kept on dropping it.
When he raised it high, it fell behind him. When he swung it down, it slipped from his hands.
More than once or twice, he had clocked himself in the forehead – and somehow, these were the only times he swung the wooden sword correctly, adding insult to injury.
For Shichika Yasuri, the kaleidoscopic footwork of Kyotoryu Form Seven, the Kakitsubata, was a piece of cake, but somehow the second he picked up a wooden sword, he stepped on his own toes, and would have looked inelegant beside a toddler.
He was so bad he made it look like he was doing it on purpose.

Katanagatari Omnibus 3, Page 276