They checked their Tokyo hotel room for a hidden camera. Then they found an SD card under the TV

What began as a precaution in a Tokyo hotel room turned into exactly the kind of discovery most travellers hope never to make. A couple checking for hidden cameras found what looked like a tiny lens under the television, removed it, and discovered an SD card inside.

A routine check took a sharp turn

Sedef Demir said one of the first things she did after arriving with her husband at their hotel in Tokyo was look around the room for anything unusual. She had heard before about cameras being secretly placed in hotel rooms, so the check was not random. It was something she already had in mind before settling in.

The room was at Hotel Aperto, an adults-only property the couple had booked through Booking.com. While looking around, Demir noticed what appeared to be a small lens fixed beneath the television. What stopped them was not just its size, but the fact that it did not seem to belong there.

She said she and her husband examined it more closely and realised it did not appear to be part of the TV itself. According to Demir, it had been attached with adhesive and was not firmly built into the set. When they carefully took it off, they found an SD card inside.

That discovery left them unsure about exactly what they had in their hands. Demir said they were trying to work out whether it could somehow be part of the equipment in the room or whether they had actually found a hidden camera. Instead of guessing, they went straight to the hotel manager and asked for help understanding what they had found.

The answer, she said, was immediate and unsettling. The manager confirmed that the device was a hidden camera and apologised.

Police were called, but key questions remained

Demir has made clear that she is not accusing hotel staff of placing the device in the room. Even after the manager confirmed what it was, the couple still did not know who had installed it.

The manager suggested that it may have been left behind by a previous guest, but that was presented as a theory rather than a finding. Demir said the manager took the camera to his office and police were called.

Police arrived with two other individuals, and the SD card was examined. Demir said they were told the card was empty. Because of that, she said officers told them they could not pursue criminal charges based on what they had found.

The room itself was also checked for any additional devices. Demir said police searched the space for other cameras and found nothing else.

Even with that search completed, several of the most obvious questions had no answer. Demir said they still do not know who put the camera there, how long it had been in the room, or whether it may have recorded anything before they discovered it.

The hotel offered the couple one extra night free of charge. Demir said they chose to check out the following day because they no longer felt safe.

A discovery like this is still unusual, but experts say it is not as rare as many people think

The case also drew attention to how hotels and booking platforms treat privacy violations involving surveillance devices.

Booking.com said customer safety and privacy are top priorities and that surveillance devices are not allowed in places where guests should reasonably expect privacy, including bedrooms, bathrooms, changing rooms, saunas and spa facilities. The company said hidden recording devices are strictly banned and that any surveillance equipment must comply with privacy and data protection laws. It also said properties that do not follow those rules can face warnings, suspension or removal from the platform.

A cybersecurity specialist, Adrianus Warmenhoven of NordVPN, said discoveries like this are still relatively uncommon, but they happen more often than many travellers assume. He said the shrinking size of cameras and the low cost of the technology have made them easier to hide.

Warmenhoven also pointed to what he said counter-surveillance professionals have been seeing in recent years. According to him, their workload has roughly doubled, suggesting the problem may be more widespread than official figures show.

He said the couple handled the situation correctly by documenting what they found, notifying the hotel and the booking platform, and involving local law enforcement. His only added advice, he said, would have been to leave the hotel immediately.

Warmenhoven described the impact of finding a hidden camera in a private room as serious because accommodation is a place where people sleep, undress and expect to be alone. He said the experience can leave people anxious, distrustful of hotels or rentals, and feeling exposed, particularly when they are in another country and may also be dealing with language barriers or uncertainty about their rights.

The places people are told to check first

For travellers wondering how someone even spots a device like this, Warmenhoven said people do not necessarily need specialist equipment. In many cases, he said, a smartphone can help.

He said the first step is to pay close attention to electronic objects that already make sense in a room, especially anything facing a bed or bathroom. Devices are often hidden in everyday items that blend in rather than stand out. The examples he gave included smoke detectors, alarm clocks, showerheads, USB chargers, power outlets, air purifiers, screws and coat hooks.

He also recommended using a light to inspect suspicious spots. According to him, camera lenses can reflect red or blue when light hits them.

Another suggestion was to look at the Wi-Fi network. Warmenhoven said apps such as Fing can show all devices connected to the local network, including cameras, which can help identify something that should not be there.

He also recommended a simple router test. If the Wi-Fi router is switched off and the host or owner quickly contacts the guest to complain, he said, that is a serious warning sign that cameras may have been using that connection to stream.

Demir said she hopes speaking publicly about what happened will make other travellers more alert and encourage relevant organisations to provide better online tools for dealing with incidents like this. She and her husband have contacted the Japanese Hotel Association to complain, but she said they have not yet received a response.

For now, the story is notable not because it ended with a clear explanation, but because it did not. The camera was found. The card was empty when examined. The room was searched. The couple left. But the central mystery remained in place: who put a hidden camera under the television in a Tokyo hotel room, and how long had it been there before anyone noticed?