Written by Jonathan C. Wojcik - Thanks everyone who contributed art!
Seemingly thousands of oddball goblins, demons, spirits and monsters populate Japan's traditional spook-story lore, known collectively as "youkai" and ranging from such ancient figures as the Tanuki to more modern urban legend like the Slit-mouthed Woman. Some of these creatures were once firmly believed to exist, while others made their debut in works of art, poetry or riddles, taking on life of their own as cultural icons that persist to this day.
Perhaps one of the greatest influences on modern Youkai awareness was the artist Toriyama Sekien, who illustrated over 200 creatures - both traditional and of his own design - in a series of four books published in the late 1700's. Among them, an outlandish-looking monster he called the Sazaeoni.
A "Sazae" is a distinct variety of sea shell belonging to a type of snail, also known as a "turban shell" and even eaten as a delicacy, though this is hardly surprising since we're talking about Japan and an animal that comes out of the sea.
In a humorous short story of indeterminate origin, a crew of pirates rescue a beautiful woman mysteriously found drowning on the high sea. When they begin to argue over her, she agrees to sleep with the entire crew...but removes their genitalia in the process. It's not quite clear how exactly she does this, but she reveals her true form as a monstrous snail-beast, and returns the pilfered extremities only in exchange for a share of the pirate's loot, or "gold for gold" as the joke goes; a term for testicles in Japan is "kin tama" or "golden balls."
In traditional Youkai lore, it seems that almost anything can transform into a monster under certain conditions, and Sekien, for whatever reason, decided that the possibility of a Sazae monster demanded illustration. Ever since, variations on the creature have cropped up throughout Japanese monster culture, and though it's difficult to pin down how, the Sazaeoni has adopted its own set of popularly recognized powers and characteristics well beyond Sekien's original vision.
Sazae monsters from Digimon, Super Sentai and the definitive Youkai franchise, Gegege no Kitarou!