Sengoku Basara: Samurai Kings Seasons 1 & 2 contains episodes 1-26 of the anime plus the OVA all directed by Itsuro Kawasaki.
In the burning battlefields of feudal Japan, rival warlords hack and slash their way to total domination. But when a supreme evil threatens the land, these fierce generals build an army of armies to obliterate their common foe.
Season 1 – Sengoku Basara Chosokabe Motochika-kun and Mori-kun” Episode 1-7, Textless Songs
Season 2 -Episode 6 Commentary, Episode 12 Commentary, Sengoku Basara II Katakura-kun, Episode 1-7, Textless Songs