Hirata Runa, an 8-year-old child pop star and trainee with the Japanese girls’ idol group DIANNA Project, died from influenza-related myocarditis, according to an announcement posted to her X account.
DIANNA Project Announces the Death of Hirata Runa
The young performer’s death was confirmed by her management team through social media. DIANNA Project released a formal statement explaining that the up-and-coming idol died due to myocarditis resulting from influenza. The agency requested privacy on behalf of the grieving family during this difficult time.
“We extend our heartfelt thanks to all the fans who supported Runa Hirata and to everyone involved who provided their support,” the group shared in their statement.
Hirata Runa Shared a Final Upbeat Message
Just days before her passing, Hirata Runa completed her final stage performance on September 20, 2026, according to reporting by The Standard. Following the event, she shared an upbeat message with her supporters online. “Thank you for today too, I appreciate it. It was so much fun,” she wrote.
Only eight days later, her team shared a farewell message on her X account. “To all the fellow idols who were kind to Ruyu during her lifetime, to the fans who supported Ruyu, to everyone at the agency who made Ruyu an idol, and to all the people who were involved with Ruyu, thank you very much,” her representatives posted.
Medical Context Behind Myocarditis and Influenza
Myocarditis is defined as inflammation of the middle muscular layer of the heart wall, known as the myocardium, according to the American Heart Association.
Did you know?
Hirata Runa Died from Influenza Myocarditis
What caused the death of Hirata Runa?
The DIANNA Project stated that she died from myocarditis resulting from influenza on September 25, 2026.
When was her final performance?
Her last stage appearance took place on September 20, 2026, just five days before her passing, according to The Standard.
What is myocarditis?
According to the American Heart Association, myocarditis is an inflammation of the myocardium, which is the middle muscular layer of the heart wall.
“Thank you for today too, I appreciate it. It was so much fun.”
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