Season 0 of Ikkitousen premiered on June 22, 2007.

Season 1 of Ikkitousen premiered on July 30, 2003.

In an adventure where teen brawlers are guided by ancient warrior spirits, Hafuku is flashing panties and cracking skulls.

Season 2 of Ikkitousen premiered on February 26, 2007.

Modern-day Japan sees a similar struggle to that of Romance of the Three Kingdoms, between different rival schools with the three strongest being; Kyosho Academy led by Sousou Moutoku, Nanyo Academy by Sonsaku Hakufu and Ryuubi Gentoku from Seito High School. Together these three toushi, each with their own magatama, fight for the honour of becoming Ikki Tousen and fulfilling their fated destiny through battle and conquest.

Season 3 of Ikkitousen premiered on June 11, 2008.

It is Hakufu's ambition to fight against new opponents from all over the world. To pay for the travelling expenses — to be able to visit these tournaments — she got a job, to earn enough money to make her dream come true.

Little did Hakufu expect that new allies and enemies would detract from her goal. Or that she might even be considered a weak leader in the eyes of her companions. To top it off a sister suddenly appears, making it painfully obvious to Hakufu that she does not really know much about her mother's past.

Season 4 of Ikkitousen premiered on March 26, 2010.

Nanyou Academy, led by Sonsaku Hakufu, allied with Ryuubi Gentoku's Seito High School, have together won a resounding victory over Sousou Moutoku's Kyoushou Academy at the Battle of Chibi. However, there is no rest for the weary as a figure stirs from within the site of the battle...

At the same time, another figure stands before the gates of Kyoushou. Upon closer inspection, it turns out to be a high school girl with a ponytail, wearing a jersey and toting a rucksack. She smashes aside all Kyoushou fighters who try to stop her. Occupying the academy's P.A. room, she issues her challenge: "I am Ryoushuu's Bachou Mouki! Fight me, Sousou Moutoku!"

The peace won at Chibi is short-lived. Despite the recent setback, Sousou Moutoku is fast recuperating his power. In addition, a new faction arises in the form of Nanban High School.