This is the background music that plays in the long massive stage of Osaka Castle from Sengoku Basara 2. Judging by the nature of the level, the battlefield is swarmed with many enemies and the main gate is heavy guarded by Hanbei Takenaka who turns out to be a major handful when you fight him especially on hard mode. Once he's defeated, your allies will capture the massive cannon that situated afar from in front the castle and will blast a huge chunk of the main keep once the player reaches the boss room when Hideyoshi Toyotomi is in after clearing out the second floor of enemies. Osaka Battle Formation is also the perfect place to rack up some good zenny as well as frenzy hits against waves of enemies and is considered as one of harder stages in the game.
I do not own the music or the artwork in this video as they are the property of both Makoto Tsuchibayashi and Capcom respectively.