Yumichika's "zanpakutō" is , a kidō-type zanpakutō. However, since the 11th Division has an unspoken rule that "zanpakutō" are only to be used for direct attack, Yumichika keeps this fact secret. According to himself, he would risk dying to conceal his zanpakuto's true power. To conceal it, he releases with the name with the command , causing the vexed weapon to assume a form consisting of a sickle-shaped blade which can split into four identical blades. During the fight with arrancar Charlotte Cuhlhourne, Yumichika tells him that his "zanpakutō" has a favorite and least favorite color and this is why he releases it as Fuji Kujaku (wisteria is the least favorite color). When confident he will be able to keep it a secret, he uses his zanpakutō's real name and command to assume its true released form with the blades splitting into vines which bind the opponent and siphon their spiritual energy into flowers which can restore Yumichika's health when their petals are eaten. Yumichika claims that a full drain from his zanpakuto can kill an opponent, which is proved when he kills an arrancar.