Hanbei seeing his lord become greedy with indulgence, however, Hanbei captures Inabayama Castle by himself to have Tatsuoki finally listen to him. By this time, the Oda army is invading their lands and the incompetent Tatsuoki wails for Hanbei to save him. Realizing that the Saitō are at the end of their rope, the young strategist decides to test the "fool's" worth. Asking the generals about their lord, Hanbei more becomes fascinated by Hideyoshi's wit and abandons his half-cocked interest in Nobunaga.
After the Saitō family falls, the strategist accepts Hideyoshi's invitation and aids his new lord at Anegawa. With Hideyoshi, he meets Kanbei and the two geniuses unite their intellect for victory. When news of Shingen's death spreads, Nobunaga uses this grand opportunity to eliminate the Takeda at Nagashino. As Kanbei and Hanbei's tactics begin to corner Katsuyori, the supposedly dead Shingen returns to defend his family. Hanbei directs the Oda army to ensure that Shingen dies a real death and the Takeda fall. When Motonari joins with the resistance against Nobunaga, Hanbei looks forward to testing the Mōri strategist and aids the naval battle at Kizugawa.
While Nobunaga stays behind to deal with the central part of the land, he sends Hideyoshi west to take care of the Mōri in Chūgoku. Motonari joins forces with Motochika and resist Kanbei and Hanbei. The younger strategist believes that the serene world he desires is beginning to take its shape and looks forward to carrying out his plan once the battle ends. Although the Mōri leader calls upon his Kyushu allies for assistance, he is defeated by Hanbei. Kanbei expects Hanbei to slay their adversary to end the conflict, but the younger strategist instead chooses to negotiate with Motonari. Believing in Motonari to honor his word with a peace treaty, he declares the three strategists to get along henceforth. Swearing with his two friends to create a world where everyone can laugh and sleep, Hanbei is confident that no one can defeat the new trinity of geniuses.