Hari, the Slender Sword
Hakuhei Sabi challenges Shichika to a duel for possession of the Hari Sword and the rest of Shikizaki Kiki's Blades. Meanwhile, the Maniwa Ninja's 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 doesn't take her long to kill all three of the Ninja sent after her.
Aired 17/04/2010EP 4 - Hari, the Slender Sword
Katanagatari
Yasuri Shichika, seventh successor of the Kyotouryuu (bladeless) sword art, lives on an isolated island with his older sister, Nanami.
One day Shichika is visited by a woman named Togame, who requests his aid in her quest to find and collect the final twelve swords forged by the legendary master swordsmith, Shikizaki Kiki. Shichika and Togame begin their odyssey by leaving the island he called home for over 20 years. They will face twelve individuals who possess and protect Shikizaki's legendary swords.
Join Shichika and Togame on an exciting, epic adventure that defies reality as they discover the true potential of the Kyoutoryuu sword style!
(Source: NIS America)