Ōgama

A toad about eight feet long, in the mountains of Iwakuni, in Suō — modern Yamaguchi.

And its hunting method is the best thing in this entry.

It exhales a rainbow.

A rainbow-coloured vapour, breathed out across the air — and birds and insects come to it, and it inhales them back down its own throat.

Beauty as digestive apparatus

Most large predators in this tradition chase. They lunge out of the water, drop from a tree, come at you down a road.

The ōgama advertises.

It emits the prettiest phenomenon in the sky — the thing everybody stops for, the thing that makes you look up — and it does that as a fishing line. The rainbow is bait, and the bait is gullet-bound.

Which is a genuinely clever piece of natural theology, because this is a tradition preoccupied with the danger of looking. Whole classes of monster kill you through your own eyes: the woman you shouldn't meet the gaze of, the monk who grows the more you watch him, the skulls that stare.

The ōgama is that economy seen from the predator's side. It's the creature that has worked out you'll stop to look at something beautiful, and has built its mouth around that fact.

The rock

There's a tale, and it's short, and it's perfect.

A samurai named Fujita is out fishing.

He finds a convenient rock to stand on. Good position, decent footing, right by the water. He settles in.

And then the rock opens its eyes and yawns.

He'd been standing on the toad the entire time.

That's a whole genre and it has three scales

This tradition has a specific horror it returns to: the terrain is alive.

There's a ray so vast that sailors make landfall on it, light fires on its back, and set up camp — and then the island submerges.

There's a tanuki that spreads itself out as an eight-mat room, and a poet holds an entire evening's gathering inside it, and the party only discovers the truth when somebody taps out hot tobacco ash and the room convulses.

And there's the ōgama: a rock you stand on.

Island, room, rock. Same discovery at three different sizes — that the solid thing supporting you has an opinion about it.

The ōgama is the small-format version, which makes it the funniest. Nobody dies. Fujita just discovers, in the middle of a quiet afternoon's fishing, that his footing is a face.

And that closes the circle nicely, because Fujita is the man who came to watch the water — and the watcher of rainbows was already standing in the trap.

Where it's recorded, and what happened after

The ōgama appears in the Ehon Hyaku Monogatari (1841) and in the Hokuetsu Kitan, a collection of strange tales from Echigo.

It also went on stage. The giant toad turns up in the 1804 kabuki Tenjiku Tokubei material — as stage machinery, which is exactly what an eight-foot toad wants to be. Kabuki loved a mechanical monster.

And it was revived in the modern era by the novelist Kyōgoku Natsuhiko in his hundred-tales books.

One note on adjacency, flagged rather than claimed. Japan has a famous toad-sorcery tradition — the ninja-sage Jiraiya, who rides a giant toad, and whose lineage runs from an Edo novel through kabuki and all the way into modern manga. Mount Tsukuba has its own toad fame.

That's a reception layer, not the folklore record. The ōgama isn't the source of it. The two just live in the same pond, and it's worth knowing which is which.