The Nerve-Breaking Bullets (神経断裂弾 Shinkei Danretsu Dan) are a type of bullet created by the police department so they could kill Gurongi by themselves without having to rely on Kuuga. They were developed thanks to medical analysis of the Gurongi Zu-Gooma-Gu, whose dead body was found by Yusuke and Ichijo having been slaughtered by N-Daguva-Zeba.