A masked man released a tear-gas-like spray inside a bank at the Ginza Six complex in Tokyo around noon on Monday [1].

The incident occurred in one of the city's most affluent shopping districts, raising immediate security concerns for high-traffic commercial hubs. Because the suspect remains at large, police said they are treating the event as a potential criminal act involving a chemical weapon [2].

According to reports, 23 people experienced throat pain after the substance was deployed [1]. One individual was taken to a hospital for treatment [1]. A witness described the sudden onset of the symptoms, saying that several people around them began coughing and choking as their throats became irritated [1].

Security footage and witness accounts describe the suspect as a male wearing a black long-sleeve shirt, white trousers, and a white mask [1]. Following the attack, the individual fled the scene toward the Shimbashi area [1].

Authorities said they have not yet identified the specific chemical used in the spray, though they characterized it as being similar to tear gas [2]. The bank is located on the lower floors of the Ginza Six commercial complex in the Chuo-ku district [2].

Police and fire rescue teams established a perimeter around the complex to manage the scene and assist those affected [1]. The motive for the attack remains unknown as the investigation continues [2].

Twenty-three people reported throat pain after a masked man released a chemical substance

This incident highlights a vulnerability in the security of high-density commercial spaces in Tokyo. The use of a chemical irritant in a crowded environment like Ginza Six demonstrates how a single individual can cause widespread panic and medical distress without the use of traditional firearms or explosives, complicating the response for local law enforcement.