Ubagabi' refers to mysterious fiery apparitions handed down from generation to generation in Kawachi no kuni (present-day Osaka Prefecture) and Tanba no kuni (present-day the northern part of Kyoto prefecture).
姥ヶ火、姥火（うばがび）は、河内国（現・大阪府）や丹波国（現・京都府北部）に伝わる怪火。