Ikakaro (怒駆絽) is the first boss from M.U.S.H.A..
Ikakaro is a giant yellow pagoda mounted on tank treads with a skull on the top. It appears right at the beginning of the first stage, shooting explosives from the two mounted turrets on the front. Once these two turrets are destroyed the boss will retreat, with the entire stage spent pursuing it.
It will show up again at the end of the stage. This time it will use hidden turrets which open and close while shooting at the player. Once these are destroyed the boss will finally stop and begin attacking will the skull on the top, shooting waves of slow moving flaming skulls at the player.