The first full-length adventure from Gosho Aoyama, the legendary creator of Case Closed!Yaiba Kurogane is an energetic young swordsman who?s grown up in the jungle training to be a samurai with his father, Kenjuro. When they return to Japan, chaos seems to follow wherever Yaiba goes! Destined to be a legendary hero, Yaiba must learn to be a true samurai and save the world!Yaiba, accompanied by the 400-year-old Musashi Miyamoto, and his friends Sayaka, Kagetora, and Shonosuke, embarks on a training journey so he can defeat Onimaru. Onimaru, now a demon, has seized control of Japan and turned the parliament building into Onimaru Castle! His sights are set on Raijinken?Yaiba?s Thunder God Sword?and he?ll stop at nothing to take it!