Ikki tousen - Season 4 (2010)

While Hakufu visits her sister, the Saito Academy fighters set sail for the tournament but soon discover a vicious rival team has invaded their boat..

Ambushed, Kanu and Ekitoku fall overboard, but their pals are captured and forced to Nanban Island. In a bathhouse, Gentuko battles rival Shimei.

Mouki and Kyocho escape, and Kanu is called to the fight arena by sinister mastermind Kentei. Hakufu, moved by an intense vision, rushes to Nanban.

Determined to unleash Gentoku's inner dragon, Kentei launches a demonic attack on the Seito team, who now realize the tournament is a trap.

In the nick of time, Hakufu rejoins her team as they battle Kentei, while Kanu fights the vengeful one-eyed dragon warrior Shimei.

In a desperate search for Kanu, Mouki, Hakufu and her cousin Koukin battle their way through the heavily guarded, labyrinthine Nanban fortress.

As Kanu and Shimei's to-the-death battle rages, Hakufu is buried in rubble while trying to protect Koukin from Kentei's fierce disciple Teni.

After Hakufu's battered body is restored and Kentei's identity revealed, the epic conflict between the ancient warriors comes to its brutal climax.

To celebrate their victory and safe return to Saito, the teens throw a party for Gentoku, unaware that in another part of town, a new evil lurks.