Authorities evacuated the Ginza Six luxury shopping mall in central Tokyo on Monday after an unidentified substance was sprayed inside the building [1, 2].

The incident caused widespread panic in one of Japan's most affluent shopping districts, triggering a massive emergency response from police and fire officials [1, 2].

Shoppers and staff reported a strong, unusual odor spreading through the facility [1, 2]. The substance, described as a toxic spray, left several individuals feeling unwell [2]. Reports on the number of affected people vary, with some sources stating at least 15 people felt unwell [1], while other reports indicate around 20 people were injured [3].

Emergency responders secured the area as the mall was cleared of all occupants [1, 2]. Officials said they have not yet identified the source of the spray or the specific chemical composition of the substance used in the attack [1, 2].

Local authorities are currently investigating how the substance was introduced into the mall and whether the act was intentional [1, 2]. The Ginza district is a high-traffic area known for its luxury boutiques and international tourists, making the security breach a significant concern for city officials [1, 2].

Medical teams treated those affected on-site and at nearby hospitals [1, 3]. The exact nature of the injuries remains under investigation as officials analyze the air quality and residue left behind by the spray [2, 3].

A strong, unusual odour spread through the mall, prompting evacuation

This incident highlights the vulnerability of high-density commercial hubs to chemical threats. Because the substance remains unidentified, the event underscores the challenges urban emergency services face in rapidly diagnosing non-traditional attacks in crowded environments.