Clash in the Inland Sea of Seto! Fugaku, the Great Fire-Belching Fortress of the Sea!.This takes place before Yukimura and Masamune led the factions to Azuchi Castle. Motochika meets with Toshiie Maeda and Matsu Maeda, who, both serving Oda as their lord, deliver a message to seed Sanuki and Eao. In response, Motochika tries to convince them to join his side instead. Keiji, who is currently imprisoned in Aki at Itsukushima, is approached by Motonari. Keiji, after mentioning to Motonari that Motochika is equipped with a powerful ship called the Fugaku, convinces Motonari to arrange a hostage exchange with Motochika to negotiate an alliance against Oda. Motochika lets Toshiie and Matsu know of this plan, suggesting they should find their resolve in whom really to support. During the negotiation at sea, Motonari tricks Motochika and takes over the Fugaku. In anger and disbelief, Keiji then breaks free from the ropes and attacks Motonari, but he is hit by an arrow and falls into the sea. This leads Motochika and Motonari to engage in a fierce battle against each other. However, Keiji survived from drowning, persuading them to stop fighting. As Kasuga arrives, it is implied the assault on Azuchi Castle just began. Motochika and Motonari, along with the others on board, head towards Azuchi Castle to join the fight against Oda.