The Obariyon is a Japanese "piggyback demon" from local folklore. While a person is walking along a woodland or grassy path, the Obariyon may jump out and attach itself to their back. While it cannot be seen, its weight can be felt by the person, and it becomes harder to walk. The Obariyon cannot be easily removed without the use of magic, but it is said if you can remove it and take it home, it will turn into many valuable gold coins.
"A Japanese "piggyback monster" that jumps on people's backs as they walk along grassy paths. It is heavy and not easily removed, but if you can take it back home, it will turn into gold coins."
—Shin Megami Tensei IV Apocalypse compendium
Obariyon appears within Kanda-no-yashiro. It can teach the Binding Claw, Patra and Sukunda skills through its Demon Whisper. Obariyon gains a slight benefit from learning physical, Darkness, ailment and healing skills.
"A Japanese "piggyback monster" that jumps on people's backs as they walk along grassy paths. It is heavy and not easily removed, but the tales say if you can take it back home, it will turn into gold coins."
Appears in the case file Fear of Betobeto: Thought to be Betobeto but when Raidou arrives to investigate it is revealed to be Rumored Obariyon following soldiers from behind in Kasumidai. Much faster than regular Obariyons and having much more HP, they appear in several waves of five and are still weak to wind. After Obariyon's defeat he thanks Raidou for beating them since they couldn't stop once they picked up that speed and just kept going.