Katanagatari Temporada 1 Episódio 4

Hakuhei Sabi challenges Shichika to a duel for possession of the Hari Sword and the rest of Shikizaki Kikis Blades. Meanwhile, the Maniwa Ninjas Insect Squad attempt to kidnap Nanami and use her as a hostage against her brother. However, the Insect Squad soon discover that although Shichika is the head of the No Sword School, Nanami is far superior to her brother in combat and it doesnt take her long to kill all three of the Ninja sent after her.