Tengumaru is an average katana with a white hilt-wrapping and heart-shaped tsuba (befitting his name).
Shikai: His release command is "Crush Down" (打ち砕け, uchikudake).Tengumaru transforms into a large black kanabō, more than twice the height of an average man. It is covered with bladed protrusions, and the handle itself is almost taller than an average man. It is also very sturdy.
Shikai Special Ability: Tengumaru possesses the ability to manipulate fire.
Hifuki no Kodzuchi (火吹の小槌, Fire-Blowing Gavel): wielder swings Tengumaru up and it ignites itself in flames he then points it downwards and a huge fireball fires from the tip where upon making contact with the target the fire explodes outwards a great distance with the resulting blast being strong enough to cave in buildings near the center of impact. At the site of impact a huge column of burning flames forms further incinerating anything in the area.