Rei Kanazawa rehearses in a car park. It is the only place, she explains, large enough to lay out her drones in their starting grid, four hundred small machines arranged on the asphalt like a field of sleeping insects. Beyond the fence lies the dark water of Tokyo Bay and, further off, the glittering towers of the waterfront. At a nod from Kanazawa, a technician taps a laptop. The drones wake, one row at a time, and rise together into the sky.
For eleven years before she ever touched a drone, Kanazawa was a dancer with a small butoh company in Kyoto, performing the slow, unsettling movement style that emerged in postwar Japan. She came to technology by accident, when a friend asked her to consult on a corporate light show that looked, in her words, like a screensaver. She agreed to help on one condition: that she could treat the swarm as a single body rather than a screen of pixels.
That idea has become the signature of her studio, Murmur Light. Most drone shows form recognisable images in the sky, logos and animals and flags, snapping from one shape to the next. Kanazawa's performances rarely depict anything at all. Her swarms breathe, contract and unfold, drifting across the sky with a weight and hesitation that feel unmistakably organic. Audiences often describe them as closer to a flock of starlings, or a jellyfish, than a firework display.
Teaching a swarm to hesitate
Achieving that effect is technically demanding. Kanazawa works with a small team of engineers who write custom flight software, allowing her to shape the swarm's movement by dancing it herself. She performs each sequence in a motion-capture studio, and her gestures are translated into flight paths for hundreds of drones. The engineers then spend weeks adding tiny, deliberate imperfections, delays and wobbles, because a perfectly synchronised swarm, she insists, looks dead.
In butoh we say the body is not yours. It is borrowed from the dead and the unborn. The swarm is the same. — Rei Kanazawa
Her work has drawn commissions from festivals in Osaka, Lisbon and Melbourne, as well as a growing number of private clients, some of whom prefer not to be named. She turns down most corporate requests, particularly those involving logos. The drones are expensive, the permits complicated, and a single evening's performance can require months of negotiation with aviation authorities and with local residents who worry, reasonably, about noise and birds.
Kanazawa takes those concerns seriously. Her shows are brief, rarely longer than twelve minutes, and scheduled to avoid migration seasons. She has also begun experimenting with smaller, quieter drones and with performances for tiny audiences, a hillside in Nagano, a private garden in Kamakura, where the swarm barely rises above the treetops. These intimate works, she says, are closer to what she once did on stage than anything she has made for thousands.
At the end of the rehearsal, the swarm settled into its final form, a slow, luminous spiral that seemed to exhale above the water before dissolving into darkness. The drones came home one by one, landing in their grid with small whirring sighs. Kanazawa watched them in silence, hands folded, as though waiting for applause from the sky. Then she turned to her technicians, bowed slightly, and asked them to do it again.
