Kappa to Shirikodama – Kappa and the Small Anus Ball

Translated and adapted from Mizuki Shigeru’s Mujara and other sources

To learn much more about Japanese Ghosts, check out my book Yurei: The Japanese Ghost

You have a magical ball in your butt, and kappa want it.

At least that is how the story goes. Although modern kappa are often portrayed as cute and mostly harmless, during the Edo period they were monsters who had a particularly vicious method of killing their victims. In probably one of the strangest bits of Japanese folklore, it is said that human beings have something in their body called a shirikodama (尻子玉), which translates literally as “small anus ball.” The ball is nestled either immediately inside the anus, or deeper inside the intestines or the stomach. The kappa have a preferred method of extraction.

Folklorist/manga artist Mizuki Shigeru wrote:

“Ever since I was a child I heard that I had to be careful in the water because the kappa would try and take my shirikodama. It was said that in the water, a kappa would come from below, extend an arm upwards and stick a hand up your anus to extract the ball.”

In some stories, the kappa don’t reach up with their hands but instead actually suck the shirikodama from the body. However it was taken, the person whose shirikodama was extracted from was almost always killed in the process. Usually the kappa would hold them underwater to drown them first, before taking the ball.

What is a Shirikodama?

No one really agrees on what the shirikodama is. Some say that it is the human soul, hardened into physical form. Some say that the shirikodama in pictures resembles the Buddhist Hojo, or wish-granting jewel. The hojo was onion-shaped, with a round body and a tapered top. The usual depiction of the shirikodama does indeed resemble this shape.

Many associate the shirikodama with the liver. Kappa were known to love human livers, and some say that the shirikodama was the liver, or that the ball was blocking access to the liver with the liver being the actual target for the kappa.

Why Do They Want It?

Again, no one really knows for sure. The most basic explanation is that kappa consider the shirikodama to be a delicious delicacy and that they eat it as soon as it is removed. This explanations is contradicted by some Edo era depictions such as the one by Jippensha Ikku that shows a kappa with a freshly extracted shirikodama holding it far away from his face and clearly disgusted with the item. The shirikodama was said to smell as bad as the anus it was removed from.

In one story, it was said that the kappa paid the shirikodama as a sort of tribute and tax to the Dragon King who lived under the sea and was the lord of all things under the water. What the Dragon King would want with such an item no one has dared to guess.

But they did want it. A humorous print by Hokusai Katsushika called “How to Fish for Kappa” (Onajiku kappa-wo tsuru no hō ; 同河童を釣るの法) shows a man using his own backside as bait to lure a kappa in to be caught with a net.

The Origin of the Shirikodama

The most commonly accepted origin is that drowning victims often have an open or extended anus, looking as if something was taken out of it. Bodies that had drowned in the river or ocean and then washed up on shore might have looked as if something had been forcibly extracted from the anus.

With kappa moving further and further way from their role as monsters in Japan, the legend of the shirikodama is on its way to being forgotten. Kappa have been recast in Japan as being friendly mascots of various companies or harmless characters on children’s cartoons. In movies like the popular “My Summer Vacation with Coo the Kappa,” the cute little kappa Coo never once sneaks up on its human friend Koichi to forcibly remove a magical ball from his anus.

Further Reading:

Check out other kappa tales from hyakumonogatari.com:

The Appearance of a Kappa

Do Kappa Really Exist?

The Kappa of Mikawa-cho

The One-Armed Kappa

41 Comments (+add yours?)

  1. Anonymous
    Jan 26, 2012 @ 12:18:18

    Hi Zack, you need to watch the unrated version of My Summer Vacation… . Sometimes the final cut leaves out important plot points!


    • Anonymous
      Feb 03, 2014 @ 02:34:10

      I have the unrated movie. I have watched it many times. There isn’t anything in there about that.


  2. Zack Davisson
    Jan 27, 2012 @ 09:30:00

    Hah! I must have missed that scene!


  3. Jeremy
    Feb 01, 2012 @ 02:47:31

    HBA Welcome Wagon…
    Wanted to let you know, you part of the Alliance.
    Please stop by and check to make sure your link is correct.
    Remember to say Thank You and visit the other HBA Members.

    Jeremy [Retro-Zombie]
    Visit The Madness:
    HBA Staff


  4. mark schumachder
    Feb 01, 2012 @ 18:23:18

    Nice overview of the Anus Ball. You might be interested in the below two links.

    ** make sure to scroll down for various Kappa prints **



  5. Zack Davisson
    Feb 02, 2012 @ 09:56:06

    Thanks Jeremy! I am proud to be a member of the Horror Bloggers Association!

    And thanks for that Mark. I dig those kappa prints!

    Anyone who doesn’t know, Mark runs a website about Japanese Religion/Folklore that makes mine look sad and pathetic in comparisson. Mark was a huge influence/reference for me when I was doing my MA in Japanese Folklore. Everyone should check out his site!


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  7. angrygaijin
    Mar 16, 2012 @ 04:55:00

    Wtfrack! Lol. I learned an awesome new Japanese word today: Shirikodama!

    Super interesting~~


  8. Anonymous
    Aug 10, 2012 @ 23:21:19

    what a fuck is that


  9. VVV
    Aug 30, 2012 @ 10:54:03



  10. Splint
    Nov 23, 2012 @ 17:26:23

    that’s pretty scary… lol
    no kappa will steal my shirikodama


  11. Wong Jun Kit
    Dec 26, 2012 @ 19:58:11

    Em… I though is take place to be kappa. In Chinese they said the kappa is drag down the other to take place has them


  12. Anonymous
    Mar 03, 2013 @ 15:19:51

    Am I the only one here that’s envisioning a comedy skit in which a guy goes to the proctologist for a prostrate exam, and the doctor is a really badly disguised Kappa in surgical scrubs… and they just kind of stare at each other awkwardly.


  13. nzumel
    May 16, 2013 @ 15:34:33


    The liver theory is interesting — livers are nutritious, after all! I kinda go with the drowning theory, though.


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  15. Vin
    Mar 28, 2014 @ 11:58:16

    I want to make a movie about kappas now. I’ll name it “The Soulstone from Uranus”.


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  18. Tatiana
    Mar 06, 2015 @ 17:56:27

    To be corrected. Buddist Hoju 宝珠 instead of Buddist Hojo


  19. kharma
    May 14, 2016 @ 03:21:04

    … Maybe the Shirikodama is the prostrate gland and the whole thing came from a euphemism for anal sex?


    • kdkd2
      Oct 11, 2017 @ 18:40:38

      maybe japanese people keep the soul in the prostate? although I’m sure the stories would have mentioned that japanese women have nothing to fear from kappa as they lack a soul


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