How Tokyo’s Deaflympics Turned Sound Into Something You Can See and Feel

The 2025 Summer Deaflympics in Tokyo didn’t just celebrate a century of deaf sport. It became a living laboratory for technology that could reshape how all of us experience live events.

Imagine sitting in a packed judo arena and feeling every slam ripple through your body, not through your ears, but through a small device draped around your neck. That was the reality for spectators at the 25th Summer Deaflympics in Tokyo last November, where organizers deployed an astonishing suite of technologies designed to translate the roar of competition into something visible, tangible, and universal. The games ran from November 15 to 26, 2025, featuring 223 events across 21 sports, and they drew roughly 280,000 spectators, nearly triple the original target.

Paul Carter, the BBC presenter behind the long-running show TechXplore, traveled to Japan to document the innovations firsthand. His report, airing this weekend on BBC News, captures a competition where elite athletic performance and cutting-edge accessibility tech collide in ways that feel genuinely futuristic. Carter is no stranger to the intersection of sport and technology. He covered the Paris 2024 Olympics and Paralympics for the same series. But what he found in Tokyo, he says, goes further than anything he has seen before.

Let’s start on the athletics track. In most competitions, a starting pistol fires and sprinters explode out of the blocks. Deaf athletes, of course, cannot hear that bang. Traditionally, visual light signals replaced the gun, but reaction times still lagged because light is processed differently by the brain than a sudden physical jolt. Tokyo’s organizers experimented with vibrating starting blocks that deliver a tactile pulse directly to the athlete’s feet and hands at the moment of the start. The idea is simple, almost obvious once you hear it, but the engineering behind delivering a perfectly synchronized vibration across eight lanes simultaneously is anything but trivial. The potential payoff? Shaving off precious hundredths of a second from reaction times, closing the gap between deaf and hearing sprinters.

Over at the judo venue, the innovation shifted from athletes to fans. Spectators were given haptic feedback devices worn around the neck. These necklace-shaped gadgets picked up vibrations from the tatami mat, translating strike impacts, foot movements, and throws into real-time pulses that the wearer could feel. The technology was originally built for concerts, where it lets deaf audience members experience music through vibration. In Tokyo, engineers tuned it specifically for the rhythms and intensities of combat sport. As Carter wrote, the result was ‘an immersive, shared experience that’s bringing deaf and hearing fans closer together.’

But the sensory reimagining didn’t stop at touch. At the table tennis venue, sounds from the competition were converted into onomatopoeic words. Picture a screen flashing ‘Woo Hoo’ or ‘Clap’ in sync with the crowd’s reaction, turning audio atmosphere into visual text that deaf spectators could read and feel part of. At the swimming pool, special smart glasses projected holographic overlays showing athlete bios, split times, and race progress directly into the wearer’s field of vision. You didn’t need to look away from the pool to check a scoreboard. The data floated right there in front of you.

The Tokyo Metropolitan Government invested heavily in what it called ‘universal communication’ infrastructure well beyond the sports venues. Transparent translation screens were installed at subway stations across the city, converting spoken Japanese into multilingual text in real time. The displays, installed at 38 government-owned locations, helped not only deaf visitors but also the flood of international tourists who arrived for the games. The city promoted itself under the motto ‘with anyone, anytime, anywhere,’ and for once, the slogan wasn’t empty marketing. SoftBank, serving as a Total Support Member sponsor, provided additional accessibility technology and services throughout the event. Asics also partnered with organizers as a Total Support Member, supplying athletic equipment.

What makes the Tokyo Deaflympics historically significant goes beyond gadgets. This was the centennial edition of the event. The first Deaflympics, then called the International Silent Games, took place in Paris in 1924, making them older than the Paralympics by more than two decades. Yet public awareness has always lagged far behind. A 2021 survey by the Nippon Foundation Parasports Support Center found that only 16.3% of Japanese respondents had even heard of the Deaflympics, compared to near-universal awareness of the Paralympics. By July 2025, after years of promotional campaigns, that number had climbed to 38.4%, a significant jump but still a fraction of the 95.5% awareness rate for the Paralympic Games.

The attendance figures suggest the awareness gap is closing. Free admission to all competition venues certainly helped, but the real draw was the experience itself. More than 50,000 people visited the Deaflympics Square at the National Olympics Memorial Youth Center, a central hub that combined a media center, cultural exhibitions about deaf culture, warm-up areas, and food vendors. Fans cheered athletes using hand-formed ‘Cheer Signs’ developed by the Tokyo Metropolitan Government, a visual alternative to applause that became one of the most photographed moments of the games. A total of 39 deaf world records and 62 Deaflympic records fell during the 12 days of competition, and Adam Kosa, president of the International Committee of Sports for the Deaf, described the event in operational terms as ‘a world-level sporting event just as the same as the Olympics and the Paralympics.’

There is a bigger story here, one that extends well past the closing ceremony on November 26. Every piece of technology tested in Tokyo, the haptic devices, the smart glasses, the transparent translation screens, the onomatopoeic scoreboards, has applications far beyond deaf sport. Think about a baseball fan who is hard of hearing, or an elderly spectator struggling to follow rapid announcements, or a tourist at a soccer match in a country whose language they don’t speak. The tools that made the Deaflympics accessible could make every sporting event, every concert, every public space more inclusive. Athens, Greece, has already been named host of the 2029 Summer Deaflympics, and the expectation is that Tokyo’s tech innovations will become the baseline, not the exception. As Governor Koike told the closing ceremony, ‘The Deaflympics has spurred the spread of cutting-edge technologies that support universal communication.’ If she’s right, Tokyo 2025 won’t just be remembered as a great sporting event. It will be remembered as the moment accessibility technology went mainstream.