Babasare is a Japanese urban legends. The children today may not know about them, but a generation ago, children learned about them from books that compiled modern-day youkai, and were terrified of them.
Having said that, the name "Baba" makes you think, "Oh, it's an old woman's youkai," and many readers don't know what it is, so I'll explain the details here.
Overview[]
A youkai that takes the form of an old woman carrying a scythe. When he hears Babasare's story, he appears on the other side of the door or window and knocks on the door. At this time, he inadvertently opens the door, but in the end, it is said that Babasare cuts off his neck with a sickle.
However, if he doesn't open the door and chants "Babasare, Babasare, Babasare!" three times, Babasare will run away. There is a record that Ayako Kobayashi, who played the childhood of the main character in NHK's morning drama "Oshin", told this story at the shooting site.