Gyokuken (玉犬) is a shikigami, or conjured spirit, in the manga and anime series Jujutsu Kaisen. Summoned by the character Fushiguro Megumi through the Ten Shadows Technique, Gyokuken takes the form of divine dogs used in combat against curses. Though not a human character, Gyokuken plays an essential support role, assisting Megumi in battles by tracking, attacking, and protecting him. The dogs are loyal and powerful, embodying the strength of Fushiguro's jujutsu abilities throughout the series.