The second season of Shin Samurai-den YAIBA.

The protagonist, Yaiba (Kurogane Yaiba), is a wild samurai boy who trains in the jungle with his father, Kenjuro! By chance, Yaiba returns to Japan, where he meets his rival Takeshi Onimaru, who has the same samurai spirit as Yaiba, in a new training ground.
 
Yaiba is living a life of serious competition, but when Onimaru obtains the “Legendary Demon Sword”, he is on a journey full of spectacle and great adventure...! 

(Source: Crunchyroll News)

Upon enrolling in school, Yaiba quickly crosses swords with his soon-to-be rival, Onimaru. When Onimaru is transformed into a demon by the cursed power of Fujinken, the Wind God’s Sword, Yaiba embarks on a quest to Mount Tengu to find his own enchanted sword. But Yaiba lacks the skill and knowledge to use such a powerful weapon. If he can’t control himself, it will control him! 
(Source: VIZ Media)

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