In the early 1990s, Sony's headquarters had a department known as the 'ESPER Lab.' Its formal name was the ESPER Laboratory, and its subjects were ki, clairvoyance, and 'nonvisual perception'—the ability to distinguish colors without using the eyes.
Why would a company that brought transistor radios, the Trinitron, and the Walkman to the world have such a room at its center? It is easy to dismiss it as the eccentric behavior of a major corporation during Japan's bubble era. Yet the surviving papers and testimony of those involved reveal a single, surprisingly plain question running through the work: how much of the human condition can be measured?
It Began with a Single Pulse
The story goes back to 1989. Masaru Ibuka, then 81, had an arrhythmia and was looking for a way to understand the condition of his body. He approached engineer Mitsuru Takashima, who occupied a role resembling that of a technical secretary, and asked whether his pulse could be measured.
Takashima was a specialist in electronic circuits and measurement who had studied electrical engineering at Keio University and joined Sony in 1974. Since his student days, he had been the kind of person who built his own amplifiers and speakers, measured them, and compared the results.
He had no interest in Eastern medicine or the occult. He simply regarded the arrhythmia as a disruption in an electrical signal, reasoned that pressure changes caused by blood flow could be captured as a physical quantity, and returned a few days later with a simple prototype pulse-wave monitor.
Ibuka reportedly looked at the prototype and said that the project should not end as a private diversion but continue as research at company headquarters. With those words, a device built to measure one founder's arrhythmia was elevated into a 'technology for measuring the human condition.' In 1991, pulse-diagnosis research became a formal subject inside Sony.
The laboratory invited Dr. Baek Hee-soo, known in South Korea as a leading practitioner of pulse diagnosis. What is interesting is that Baek himself did not elevate his senses into the mystique of a master's art. He put into words why he made a particular diagnosis and had begun developing an electronic pulse-diagnosis instrument to make a practice dependent on human fingertips more objective. Measure everything that can be measured; interpretation can come later. That attitude aligned directly with Takashima and the other engineers.
The scene in the laboratory was unusual. Beside an engineer placing a sensor on the radial artery and recording a waveform, Baek would take the pulse himself and say that it felt deep that day, or that the flow differed between left and right. No matter how clean and free of noise the engineering data appeared, when it did not match Baek's assessment, the measurement—not the doctor's perception—was called into question.
They would redesign the sensor position, the conditions of pressure, and the analytical algorithm. Whether to believe in Eastern medicine was not their concern. Their sole question was whether the phenomenon occurring before them could be measured.
'If You Are Going to Study Ki'
Around the same time, another current began to move. At a gathering around Ibuka, digital-audio researcher Yoichiro Sako proposed conducting in-house research on human ability and consciousness. His argument was that the 21st century would be an age of human science.
An ordinary executive might have rejected the idea out of hand. Ibuka did not, although neither did he give unconditional approval. He authorized it on one condition: if they were going to study something, they should study ki. The ESPER Laboratory was born in 1991.
An audio engineer turning toward paranormal phenomena may look eccentric, but the distance is not as great as it seems. Acoustical engineering studies the limits of human perception—the audible range—and signal processing at that boundary. It is nearly a continuous extension of an engineer's curiosity for someone who has pursued the inside of a limit to begin wondering one day about signals beyond it.
The Discovery That Nothing Could Be Detected
The ESPER Laboratory began with the condition Ibuka had set: ki. A qigong practitioner would spread their hands and look at a participant's back, and the person who was supposed to be beyond physical reach would be pulled, pushed, or pitched forward.
Was physical energy being transmitted in this phenomenon? The researchers brought in every instrument they could and looked for electromagnetic waves, heat, and sound waves.
They found nothing. No exchange of energy or physical relationship could be detected between practitioner and participant. Even the measurement technology of one of Japan's leading electronics companies could not detect ki as a form of energy.
What makes the ESPER Laboratory interesting is what happened next. The researchers did not say that an inability to measure the effect proved it false. Even without energy transfer, the apparent fact that two separated people moved in synchrony remained before them.
They therefore considered whether it might be a synchronous phenomenon beyond causality: consciousness synchronizing as information outside action and reaction. They chose to broaden the framework of physics.
Seventeen Colors of Paper and LEDs
The more concrete result they sought involved the nonvisual perception of color. Could someone distinguish colors with vision completely blocked? With the cooperation of two people described as having the ability, Sako and his colleagues designed experiments using paper in 17 colors, sponges in five colors, and LEDs.
Believing that the experiments produced significant data, they published a series of reports from 1996 to 1997 in the journal of the International Society of Life Information Science.
A paper in 1997 also connected clairvoyance with synesthesia. In an experiment where seven participants attempted to read characters and shapes drawn on rolled-up paper through senses other than sight, the researchers reported that on two of 20 trials, the first sensations to arise were auditory and olfactory rather than visual. They proposed that a circuit resembling synesthesia—hearing a sound and seeing a color—might be the true nature of the so-called sixth sense.
The work was not an internal secret. In May 1996, Sako published 'Sony's Challenge to Unknown Information' through Tokuma Shoten. An active engineer used the company's name to present an attempt to demonstrate paranormal phenomena to the public. The publication suggests that management at the time regarded this departure from convention with pride as an expression of Sony's identity.
The Death of a Patron
On December 19, 1997, Masaru Ibuka died of acute heart failure. He was 89.
Do what no one else will do. In the end, it was Ibuka alone who, under that principle, made space inside the organization for research at the boundaries of knowledge with no direct path to profit. When that breakwater disappeared, the company faced commercial reality.
Under Nobuyuki Idei, Sony was turning sharply from a hardware company toward content and networks and advocating selection and concentration. Research with no visible route to commercialization was among the first targets for consolidation. By the end of the 1990s, both pulse-diagnosis research and the ESPER Laboratory quietly disappeared. The Life Information Research Institute, headed by Ibuka himself, was also dissolved alongside a decision that Sony would not conduct medical-device research.
Ironically, in 1998 Sony became embroiled in controversy over a video camera with an infrared NightShot function. A feature intended for recording in darkness could see through thin clothing when used in daylight.
The company changed the specification so that daytime images would be overexposed and was forced to modify and replace hundreds of thousands of units. In the same year that a laboratory seriously trying to demonstrate human clairvoyance closed, the company's own optical technology easily achieved a physical form of seeing through material and created an ethical problem.
The Question Returns After a Quarter Century
The organization disappeared, but the question did not.
Mitsuru Takashima did not let go of his conviction that a pulse could be measured. He continued refining the algorithm through a company that provided a home for the research, and in 2013 became a technical adviser toLiquid Design Systems.
In 2024, the result finally entered society as 'Gogyo Doctor,' a system for checking the pre-disease state and visualizing bodily condition using only a blood-pressure monitor and a smartphone. This was 35 years after Ibuka first approached Takashima in 1989.
Yasuo Yamazaki, who had studied hypnosis and meditation at the Life Information Research Institute, also continues working with people's inner lives throughRadiance, which he founded in 1994.
Today, we wear biosensors on our wrists and have them infer sleep and stress from heart-rate variability. Enormous sums are flowing into efforts to connect the brain directly to machines. The question of how much of the human condition can be converted into numbers has come full circle over a quarter century and returned to the frontier of technology.
Many of the ESPER Laboratory's answers missed their mark. It found no energy of ki, clairvoyance could not be reproduced, and the research added nothing to the profit-and-loss statement.
Even so, the instinct to respond to something dismissed as unscientific by first building an instrument to measure it was unmistakably that company's own. The same madness that lifted a neighborhood factory into a global corporation was simply pointed in another direction. Measure everything that can be measured; interpretation can come later. Does that stance remain in today's technology companies?
