Sengoku Basara: Setonai no Gekitotsu! Hi wo Fuku Umi no Daiyousai - Fugaku!!  

Sengoku Basara OVA, Sengoku Basara Episode 13, Sengoku Basara Special, 戦国BASARA 瀬戸内の激突! 火を噴く海の大要塞・富嶽!!

Toshiie maeda and matsu visit shikoku's governor, motochika chousokabe. they inform him of unreasonable demands made by nobunaga. motochika refuses these demands and advises toshiie to betray nobunaga. meanwhile, keiji tries to persuade motonari to join the fight against nobunaga but is imprisoned. as a result, motochika and motonari become adversaries.