A Little About Me

My name is Koki Yamada. I lived in Fukuoka, Japan until I was about eight. While I was at primary school, whenever my homeroom teacher did a role call, I would always say, “Ms. Sato, you forgot Genki again.” Because, in my mind, she always did. Genki was a boy our age that, in my mind, always stayed in the classroom, but it looked like he studied and played with us. The only thing different about him was maybe the odd clothing and, of course, his misshapen head. Whenever I mentioned him, though, the other kids would give me weird looks. Weird looks turned into bullying, and I started telling my mom that I didn’t want to go to school any more. When she forced me to go, I stopped interacting with Genki. I ignored him, and he seemed to be sad because of it.

The next year, my mom and I moved to San Diego. We managed to snag a nice house on the cheap, and I soon figured out why. A little girl drowned in the bath tub in the bathroom upstairs, and the parents were so distraught that they took the first buy. offered by my mom, and moved out as quickly as possible. The little girl’s name turned out to be Ellie, and she turned into a dear friend of mine.

Ellie was a bit younger than me, 6 years old, but she seemed more mature than that. We played often together, and I just told my mom that I had an imaginary friend. I also experimented to the extent that a child can think of. I would lead her to the edges of her “zone,” which happened to be the confines of the house. She seemed to be able to go into the bathrooms, but she refused for obvious reasons. If she tried, she could mess with the power of devices plugged into the wall, but never anything on batteries (more on that later). She couldn’t interact with any physical objects. We often played games like Tic-tac-toe, chess, shogi, and Go, but she had to tell me where her pieces would go. We would read books together, but she always had to wait for me to turn the page. Her electric interference was the only impact she had on the real world, other than, well, human brains.

Our Brain

My mom was a single mother, and occasionally she went out on dates. I would see the men every so often. As the dating game goes, there are good dates and bad dates. One night, my mom came home from a very bad date. She wouldn’t tell me what happened, but she was shaking. She couldn’t even hold a drink. I tried to help her as best as a child could, but there wasn’t much I could do. Eventually Ellie saw what was happened. She put her hand on my mom’s and just looked at her. My mom didn’t react to Ellie’s hand, but her breathing quieted. Within seconds, she was breathing normally. After another few seconds, she lay down on the couch and fell asleep, right there. My mom is not a light sleeper and never falls asleep quickly. I’d never seen anything like it. Ellie just smiled and asked if we could play now.

To explain this, let me talk a little about our brains. Human brain waves give off a frequency of anywhere between 0-100Hz. These are the stages of brain activity measured by wave frequency:

Frequency bandFrequencyBrain states
Gamma (γ)35-80 HzHigh state of vigilance or cognitive activity
Beta (β)12–35 HzAnxiety dominant, active, external attention, creative
Alpha (α)8–12 HzVery relaxed, passive attention
Theta (θ)4–8 HzDeeply relaxed, inward focused
Delta (δ)0.5–4 HzSleep

https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/brain-waves

Since Ellie could manipulate electromagnetic frequencies, she could also mess with the electromagnetic synapses inside our brains. I don’t think she could do it precisely, but perhaps she could suppress the beta waves and enhance the delta waves to make my mom sleepy. I had only seen Ellie use these abilities to calm somebody down, but there are an infinite number of ways to mess with our brains, and even trigger hallucinations. This is probably where all the ghost stories come from.

What is Ellie?

Imagine, if you will, that you are a six-year-old girl playing in a bathtub, when something horrible happens. Maybe, somehow, you become paralyzed and you can’t move. Maybe, God forbid, somebody comes and pushes you down into the water. This is the scariest moment of your life. Your brain has activated its “fight or flight” response along with a flood of high beta and gamma waves. You try to save yourself, but to no avail. You breathe in the water, oxygen leaves your brain, and you know its over. At this point. imagine that your “self”, this mass of electromagnetic synapses, suddenly has no host, and desperately looks for anything to cling itself to. Imagine, miraculously, that it finds electromagnetic waves all around it, in the air, and your “self” is able to transform into a manipulation of the surrounding electromagnetic waves.

It is at this point that I’ll point out that power lines and electrical lines running an alternating current (AC), which is almost every electrical line in the world, typically resonates waves at about a 50-60Hz frequency a few hundred feet away from itself.

It’s my belief, and backed up by Hoover et al. at Nature, that if a brain fails at a moment of highest tension and trauma, like being drowned in a bathtub, that this brain operating at higher-than-usual frequencies (35-80 Hz) can, on rare occasions, successfully manipulate surrounding waves of similar frequency into a kind of post-mortal “self,” aka a ghost. Ellie was, as far as I can tell, a kind of electromagnetic “imprint” inside the house. She was a brain outside of its mortal coil.

With biting criticism, you might point out that a brain doesn’t truly die at its point of highest activity during drowning. You might say that it takes a few minutes after becoming unconscious for the brain and body to perish, meaning the brain dies in a swath of delta waves. To this, I say that you’re right! A ghost is not created exactly at death but at near-death, when the brain has truly given up on survival. To that end, there are, and I have personally witnessed, ghosts of a living person who underwent a near-death experience and survived.

The Death of Ellie

As I grew older and learned more about the ghosts all around us, I learned how truly rare Ellie was. She actually aged and matured with me. She was a brain like any other and always growing. When I was a teenager, so was she. She actually managed to change her self image to “age,” although she simply looked like an eerie taller and lankier version of her six-year-old self. It was around this time that I could no longer hide behind the facade of having an imaginary friend, so I came to my mom with the truth about Ellie and my particular ability to see and interact with ghosts.

As you might expect, she wasn’t pleased. At first, she told me that I should stop joking and teasing her. Then, she said I should stop being crazy. When I had finally convinced her of the truth with the help of Ellie, that was far worse. My mom said that she didn’t want to live in a “haunted” house and wanted to sell and move as quickly as possible.

It was around this time that Ellie became distraught. I was accepted into UCLA and was going to move into a dorm on campus. Ellie didn’t want to live alone with a woman that hated her, and if mom my sold the house, she didn’t want to deal with a new family, most likely a family that didn’t know that she existed. She was angry that she couldn’t leave the house. She was angry at her existence and didn’t see a point to it anymore.

Ellie wanted to die.

By this time, I had done my fair share of research into what ghosts are. I came up with an idea. Since Ellie’s “self” could only exclusively use the surrounding 50-60Hz waves around it, Ellie was forced into a state of concentration and high alertness at all times. She could never sleep. Imagine the brain activity needed while solving a puzzle or taking a test, chronically, at all times, 24/7. I could see why ghosts go mad.

Under the thread, I thought that if I could trick the brain into a kind of meditative state, it would instead opt for lower brain waves, Alpha or Theta, that do not exist in the surrounding air. In that sense, the ghost would “move on” by shutting down all of the Gamma waves that made up the ghostly self.

With Ellie as a willing volunteer, we said our goodbyes and tried it out. I told her to breath deeply and think about nature, waterfalls, forests, the ocean. I told her to think about good memories. I put on meditative music. Within a few minutes, Ellie faded away into nothingness. Her last words to me were, “Thank you. I love you.”

Conclusion

It was a teary experience. I grieved for her like I would a dear friend, because she was. But I also knew that I had done a good thing, and I thought that I could make my mark on the world with it. I wanted to be a “ghost guru,” so I dropped out of UCLA and started my YouTube channel. If you guys could go over there and support my channel, it would mean the world to me.

I’m also going to start a Patreon! Subscribers at $5 or more will get exclusive content during my investigations.

© 2026 Koke Investigations.