Rengoku ni Warau

Vol.6 Chapter 30: The Young Tactician, Scheming Against the Blind Ninja
Vol.6 Chapter 29: An Audience, Opposing the Demon King
Vol.6 Chapter 31: Fending Off the Iga Ninjas, Giving an Oni an Iron Club
Vol.6 Chapter 29: An Audience, Opposing the Demon King
Vol.6 Chapter 31: Fending Off the Iga Ninjas, Giving an Oni an Iron Club
The story is set 300 years before Donten ni Warau, during the Tensho Period. At Lake Biwa, the largest lake in Japan, the battle with Orochi ensued.