Demon Slayer Mark: Later during the battle against Kokushibo, Sanemi awakened his own Demon Slayer Mark that resembled a single paper origami windmill that is green in color with two dots on both sides on his right cheek. The mark dramatically increases his physical capabilities, as seen when Sanemi was still able to fight and contend with Kokushibo, despite being grievously injured and slashed across his abdomen. However, even though his physical endurance, strength, and tolerance to pain dramatically increased, Sanemi couldn't land a significant hit on Kokushibo without assistance from Gyomei and Muichiro. In addition, Sanemi would have been put into a near-death state twice by Kokushibo if it weren't for their intervention.

Bright Red Nichirin Sword: During the battle against Kokushibo, Sanemi strikes Gyomei's spiked flail with his sword, turning both of them briefly red which allowed them to decapitate the Upper Rank. Later in the fight against Muzan, Sanemi, learning from his previous encounter, forcefully clashes his sword together with Giyu's turning both of their blades temporarily red. Turning his blade red granted him the ability to hamper the instantaneous regeneration of Muzan which proved effective in the battle.