Unabara Domain—home to nightmarishly strong students and masters of martial arts of all kinds. The lord of the Unabara has decided that whichever of his sons discovers the strongest martial arts style will be his heir, but when 28th son Naoyoshi Washizu decides on Ogama-style practitioner Gama Kurogane, son of notorious father and scion of a “weak” style, to represent him, the odds seem bleak. But between Naoyoshi's determination and Gama's hard-earned strength, they may yet come out on top!

It's been two years since the infamous Unabara Tournament, but things aren't over for Iori Sengoku-in fact, he's received a summons from the Tokugawa Shogunate. He's to join in battle against the Shogunate's top martial artists to determine the strongest of the lot. Not only that, he's accompanied by the sword-crazy Ran Ichinose. No matter what, this is an adventure you won't want to miss-the thrilling sequel to Gamaran!

Gama and Naoyoshi are finally reunited! But why is Naoyoshi working together with the Muho style? And what is Nayoshi's last wish for Gama? The time for Gama to make a big decision steadily approaches! Meanwhile Shungaku Tojo, once a pillar of the Muho style, goes head-to-head with Seiya Zoin, a skilled warrior sent by the Shogunate. Amidst all the schemes and conspiracy, Tojo decides his own path!

Only two more battles remain in the first round of the Grand Tournament of the Shogunate!! Just who is this mysterious man who fights using the Ogame style, Hanjiro Okamoto?! Meanwhile Iori, who was near-fatally wounded by Tadaie Hiramatsu, somehow makes it back to Edo after his first round match has ended, but has yet to regain consciousness… While the shogunate brings in their next assassins for the second round, Tadaie sets his sights on none other than…Gama! How will Gama respond to the man who defeated his senior apprentice?!

The Ogame style may have survived a sudden attack from the Kasane-Manji and Tamagakushi styles, but they have yet to advance to the third round. Their next opponent, arranged by Ranmaru Ito, is the "Four Spears" of the spear-wielding Myojin style. It seems that they have some sort of connection with Gama's father, Jinsuke, as well. What's more-their lord is none other than Naokatsu, Naoyoshi's only trusted younger brother! The battle begins, a battle of fate that neither party is willing to yield!

The Shogunate's most powerful protectors, the “Unlimited Divine Soldiers” have laid eyes on their next target-Gama! The mysterious warrior who appeared before Gama and Iori is none other than Karai of the Unlimited Divine Soldiers! With his incredible speed and a repertoire of versatile techniques, Karai closes in on his opponents using his western-sword technique, the “Bind.” Gama retaliates with a special technique of his own, “Divine Authority”...but what will happen!? Meanwhile at the Suruga Domain Residence, Ramon leads the Unlimited Divine Soldiers' main forces in an all-out attack against Tadaie Hiramatsu!

The Tokugawa Shogunate has gathered a hundred of the strongest fighters to to compete for the title of strongest in the land - they call them the "Hundred Swords of the Shogunate"! Iori Sengoku, the reputed "Peerless Swordsman" also throws himself into battle as one of the "Hundred Swords of the Shogunate." The first to stand in Iori's path to Edo is the "genius among geniuses," Hien Shiba! In order to best Hien, whose nodachi long sword unleashes a barrage of one unpredictable blow after another, Iori launches the fastest technique of the "Ogame Five Swords"!!

The Unabara Domain, the "Den of Demons" where martial artists gather. The battle in which 31 styles compete to be named strongest in the land, The "Grand Tournament of Unabara," has begun!! The first round is a clash between four styles. Gama Kurogane, fighting solo for the Ogame Style, must next face off against the Nakaizumi style's "Mad Bow"!! Having been deeply wounded in his first match, just how will Gama's sword fare against this bow?!

On the exile island of “Ashura's Prison,” the main battle of the Grand Tournament of the Shogunate finally begins! Iori's first opponent is Kitaro Mashima of the Myojin style, with whom he shares a fated connection-Kitaro is none other than the elder brother of Sasuke, the "Crimson Ripper" of the Four Divine Spears against whom Zenmaru fought in the Grand Tournament of Unabara two years prior. Kitaro swears revenge, descending upon Iori like a wild beast, but it's nothing Iori can't manage and he quickly gains the upper hand. However when Kitaro's ear is sliced off, he undergoes a bizarre transformation and reveals his true colors!

Shinnojo and Iori clash swords for the right to stand as head of the Ogame style! However, their battle fails to reach its conclusion. Iori gives Gama his “last lesson as his mentor” before leaving the Ogame style and its members behind as they each begin to walk their individual paths. Everything is for the sake of bringing Naoyoshi back and taking Jinsuke down. Meanwhile in Juren Village, Gama and Zenmaru find themselves training under a new master by the name of Kashitaro!