I Am a Rock

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It's like the gravity of love. (まるで「重力の愛情」だ, Marude 'jūryoku no aijō' da)

I Am a Rock (アイ・アム・ア・ロック, Ai Amu a Rokku) is the Stand of Yotsuyu Yagiyama, featured in the eighth part of the JoJo's Bizarre Adventure series, JoJolion.

It is a mechanical humanoid Stand that causes any specific object to converge toward anyone Yotsuyu touches.


I Am a Rock is an artificial humanoid Stand that is about as tall as Yotsuyu. Its face has segmented eyes with visible muscles around it, a horizontal line underneath each eye, no nose, and a frowning mouth. It has a bald head covered in spikes all around the top and sides. Behind its head, it has a capsule-shaped hood-like helmet which is also covered in spikes. Its neck has a high collar with a circular emblem attached in the middle, having a single spike in the center.

I Am a Rock has long shoulder pads attached to its torso, with evenly-spaced spikes on top of them. Resembling bones, its shoulders and upper arms are extremely thin, although its forearms are wider. It has an oval-shaped torso that is lighter on its sides and back, also having several spikes covering it.

It has a thin waist with bone-like wires on the sides connecting its torso to its lower body. The Stand's legs appear to be in the shape of hammer pants. The upper center of its pelvis has a circular emblem with a symbol resembling the letter "H" and a thin zipper running below it.

Color Schemes

The series is known for alternating colors between media, the information presented below may or may not be canon.
Body(Crimson pink and beige body, gray pipes)
(Beige spikes, amber accessories, dark blue shoulder pads and upper thighs)


I Am a Rock is a close-range Stand, unable to travel far from Yotsuyu and with a short ability range. In terms of speed and power, this Stand is capable of overpowering a human like Karera Sakunami.[1] However, despite Yotsuyu's confidence in a frontal assault against Josuke, Soft & Wet is able to overwhelm I Am a Rock in a fistfight.[2]

Thus, Yotsuyu prefers to let his Stand's ability kill the target rather than openly confront them.

Selective Attraction

I Am a Rock making nuts converge on Josuke and Norisuke

When Yotsuyu touches someone, the victim begins to naturally attract specific objects toward them.[3]

After being touched, the victim will have objects slowly converging toward them with exponential speed and strength as the objects approach.[3] The objects will eventually come in contact with the victim and push into the flesh toward the center of the body.[4] Every time the power is activated, the victim will attract only one type of object, for instance, flower pots,[3] chestnuts,[5] or cans of pesticide.[6] The converging is inexorable; breaking the objects only results in more pieces digging themselves into the victim and the strength of the attraction is important, thus it is impossible to simply push away the objects.[5] Yotsuyu can affect several people at the same time with the same type of object[5] or affect himself,[6] although he is then able to toggle the ability. Yotsuyu can choose what kind of object will be attracted to the victim.[2]

Because of the great power of this ability, I Am a Rock also possesses a small range of 5 to 10 meters,[7] and it is possible to exit the range of its ability to escape.[5]

Yotsuyu typically attacks someone by using I Am a Rock in conjunction with his Rock Human physiology. By hiding in the landscape as a rock and then stealthily touch someone, he can simply wait until the victim is overwhelmed by the converging items and repeat the process if it fails.




  1. In JoJolion Chapter 31: "I Am a Rock", Part 1, Yotsuyu quotes the lyrics of the song by saying, "I am a rock. I am an island." (『オレはひとつの岩だ』『そしてひとつの島だ』)


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