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Three Female Lions Die of Heatstroke at Tokyo Zoo

8/5/2026

38 3 Full Breakdown

Summary

Tama Lions Heatstroke

Female lions – Mugi (3), Ichigo (11) and Luena (15) – died of suspected heatstroke at Tama Zoological Park on July 28, July 31 and August 2.
Ten of the park’s sixteen lions showed lethargy and loss of appetite, prompting staff treatment on July 18 and closure of lion enclosure on July 23.
Post-mortem exams found severe dehydration and organ failure, indicating heat stress as a cause during a heat wave that pushed Tokyo temperatures to 39 °C.

Summary

Japan Battles Heat

PETA condemned the safari-bus lion enclosure, stating the lions “were born, lived and died in confinement” and accusing zoos of profit over welfare.
About 18,600 heatstroke patients were hospitalized nationwide between July 20-26, with 45 deaths on arrival.
Japan aims to halve its roughly 1,300 annual heat-related deaths by 2030.
Organizers moved the World Cosplay Summit in Nagoya to an earlier date to avoid peak heat.

History

Historical Context

The 2018 heatwave that reached 41 °C in Tokyo and killed over 1,000 people began Japan’s modern rise in heat-related deaths, a trend that surged with record July 2024 temperatures and 123 fatalities in Greater Tokyo. The Ministry of Health, Labour and Welfare and the Japan Meteorological Agency expanded warnings and reforms, while the 2024 lion deaths at Tama Zoo sparked calls for stricter enclosure standards.

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Tama Lions Heatstroke

Female lions – Mugi (3), Ichigo (11) and Luena (15) – died of suspected heatstroke at Tama Zoological Park on July 28, July 31 and August 2.
Ten of the park’s sixteen lions showed lethargy and loss of appetite, prompting staff treatment on July 18 and closure of lion enclosure on July 23.
Post-mortem exams found severe dehydration and organ failure, indicating heat stress as a cause during a heat wave that pushed Tokyo temperatures to 39 °C.

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