Jubokko

A tree that grew on an old battlefield.

It stood there through the fighting and after it, and the ground beneath it was soaked, for years, in blood. And the tree took it up through its roots the way a tree takes up anything in the soil.

Now it thirsts.

When a traveller passes underneath, the branches come down and take hold — and they change, hollowing into tubes, and they drink. What's left is dropped: dry, and light, and quite clean.

And the tree looks completely healthy. That's the detail that finishes it. A jubokko is a fine, vigorous, well-nourished tree, and the reason it looks so well is what it has been drinking.

It's invented

That's a magnificent piece of horror and it was made up in the twentieth century.

The finding here is unusually definitive, which is why this entry is worth having at all.

The great folklore corpora — Yanagita's, and Iwao Hino's — contain no creature that could be the jubokko's origin. Not a thin one, not a regional cousin. Nothing.

And a Japanese scholarly group examining it concluded that there is no source of appearance for this tree at all, and that it can be theorized as a fictional creature conceived by Shigeru Mizuki.

No village believed this. Nobody warned their children about it. It appeared, fully formed and superb, in a modern yokai book.

The bigger problem underneath

Here's why that matters beyond one tree.

Mizuki did not label which of his yokai were his own inventions.

He drew hundreds of creatures. Some were faithfully rendered from thin regional records — real beliefs finally given a body. Some were embroidered. And an estimated thirty or so were invented outright, and went into the same books, in the same style, with the same authority, undifferentiated.

Which means a substantial number of "traditional Japanese yokai" circulating today — in encyclopedias, games, films, tattoo flash, and the confident corner of the internet — came out of one man's imagination in the postwar decades, and nobody kept a list.

Working out which is which is a real, ongoing, entry-by-entry job.

Where it sits on the spectrum

The value of the jubokko is that it anchors one end of a scale that only becomes visible once you have all four:

Nurarihyon — a genuinely old picture, given a completely fake job title (supreme commander of all yokai) in the twentieth century.

Gashadokuro — invented in 1966, by a named writer, and backdated onto a real Edo print that has nothing to do with it.

Kasa-obake — a genuinely old picture with no folklore whatsoever, famous anyway.

Jubokko — pure twentieth-century fiction, with scholarly consensus saying so.

Four different ways of being not-quite-what-you-were-told, and you cannot see any of them clearly without the others.

And the real version, which is bleaker

There is genuine Japanese belief about ground that has absorbed the dead. Blood-mounds and battlefield sites carry real prohibitions, and the folklore around such places is neither modern nor invented.

The jubokko is a beautiful modern fiction sitting next to a real and much quieter tradition: that some ground remembers what happened on it, and that you should be careful what you plant there.

Enjoy the tree. Date it correctly.