Kongou is an Oni that disguised himself as Tanuma. Mainly aims to destroy Kenji, if not wreaking havoc in general. He inhabits the Zipang stage of the game Red Earth.
Kongou is more than likely intended to be a boss character due to their size, power and super-armor after a certain amount of health is depleted from them. They are extremely slow, and their attacks range from swinging their club at the enemy to spraying a burst of acid from their stomach. When a certain amount of health is depleted from them, they enter a mode where their body gains a firey color, and several of their attacks gain additional effects.