Ubu is a yokai that appears as a baby from Japanese folklore. If a mother died from giving birth and was not buried properly, she will turn into an Ubume and her baby will become an Ubu. An Ubu's appearance varies depending on where it lives. Thus the Ubu of Niigata prefecture and Sado Island have a spider like appearance.
It appears while making noises like a baby's cry. Dead or abandoned babies sometimes transform into an Ubu. They grab onto passerby and kill them. To escape them, one must keep running, throw some garment such as a shoe behind you, and tell it that "it's your mother." This will cause the Ubu to stop chasing someone.
"A spider-monster that appears on Sado Island of the Niigata prefecture. It appears while making noises like a baby's cry. Dead or abandoned babies sometimes transform into an Ubu. They grab onto passerby and kill them. If one grasps your leg, take off a shoe, throw it over your shoulder and yell, "This is your mother," and it will disappear."
"A spider-monster that appears on Sado Island in the Niigata prefecture. It appears while making noises like a baby's cry. Dead or abandoned babies sometimes transform into an Ubu. They grab onto passersby and kill them. If one grasps your leg, take off a shoe, throw it over your shoulder and yell, "This is your mother," and it will disappear."
—Shin Megami Tensei IV Apocalypse compendium
Ubu appear in the west entrance passage, west entrance and government office plaza areas of Shinjuku. It can teach the Toxic Sting, Tetanus Cut, Stun Needle and Rapid Needle skills through its Demon Whisper. Ubu benefits from learning ailment and Gun skills.
