Jinsuke Kurogane is the father of Gama and the former teacher of Sengoku Iori and teacher of Ranmaru. He along with three other members of the Ogame School killed the other members of the Ogame school.(excluding: Turtle sensei, Zenmaru, Gama, Shin and Iori). Later he created the Muhou School.
Powers and Stats
Name: Jinsuke Kurogane
Classification: Human, Leader of the Muhou School
Attack Potency: Street level (Stronger than characters who are able to break thick wooden walls in one hit)
Lifting Strength: Superhuman
Striking Strength: Street Class
Durability: Street level
Standard Equipment: Sword
Range: Extended melee range
Intelligence: Average, genius swordsman
Jinsuke is probably the strongest swordsman or even warrior in the entire series: he mastered the Ogame School and all its forms (though he's never seen using their techniques, possibly out of spite). His stance leaves no weak spot, and his movements are incredibly fast and nearly impossible to perceive. He can fight even multiple powerful opponents at the same time. The peak of his power is seen in the final battle against Iori, where even injured and ill still manage to deliver an ever-changing, powerful attack to Iori. Furthermore, he's the only character of the series who was undefeated in battle.
Multiple Slash: Like many other strong swordsmen, Jinsuke can unleash several strikes in a row at great speed. He can do up to four of them in a split second.
Eyes of Divine Sight (天覚ノ眼 Tengaku no Me): Jinsuke possesses incredibly perceptive eyes, allowing him to see clearly even the slightest movement.
Kosen Mutou: Jinsuke performs with his bare hands, resulting in a tremendous fist that can send the opponent spiraling away.
Kosahou (交叉法): As stated by Ranmaru, Jinsuke taught him this counterattack technique so that he could use the Eyes of Divine Sight at their top, but he's never seen using it directly.