Three lions at Tokyo's Tama Zoological Park have died from suspected heatstroke, with several others currently undergoing medical treatment. The zoo confirmed that since mid-July, 10 out of its 16 lions have shown concerning symptoms including loss of appetite and decreased activity levels. The deceased animals were all female: 3-year-old Mugi, who died on July 28; 11-year-old Ichigo, who passed away on July 31; and 15-year-old Luena, who died on August 2.
A spokesperson for the zoo stated that veterinarians suspect heatstroke, noting that the animals exhibited signs of dehydration and multiple organ failure. While lions are often perceived as heat-resistant, the facility pointed out that Japan's summer weather—characterized by high humidity—differs significantly from the dry heat found in the lions' natural African habitats. The heat arrived abruptly following the end of the rainy season in late July, overwhelming the animals despite existing safety measures.
In response to the tragedy, Tama Zoological Park has closed its lion enclosure, which typically offers guests tours via zebra-patterned safari buses, until further notice. Staff are intensifying efforts to protect the remaining lions by increasing ventilation, utilizing industrial fans and water sprays, and installing spot air conditioners. Affected animals are also receiving intravenous fluids and medication.
The incident occurs as Japan endures a record-breaking summer. According to the Japan Meteorological Agency, 34 locations across the country have recorded temperatures of 40 degrees Celsius or higher this season, surpassing previous records. Recent data from the fire and disaster management agency indicates that between July 20 and 26, approximately 18,600 people required hospitalization due to heatstroke, with 45 deaths confirmed upon arrival. In Kumamoto City, temperatures reached a record 40.3 degrees Celsius, and officials reported the death of a woman in her 70s who was found in her car.
The deaths at the zoo have drawn criticism from the animal rights organization PETA. In a public statement, the group argued that the lions were born and kept in confinement, deprived of a natural life. PETA further asserted that zoos exist to profit from displaying animals rather than prioritizing their welfare.
"According to our veterinarian, the cause of the deaths is suspected to be heatstroke" because dehydration and multiple organ failure were observed, a spokeswoman told AFP.
