Peace, Sirens, and Staying Safe During the Memorial Day
If you’re visiting Hiroshima on August 6, you’ll experience something unlike any other day in the city.
At exactly 8:15 AM, a citywide siren sounds. This can be startling if you aren’t expecting it, but it’s not an emergency.
It marks the moment when the atomic bomb, “Little Boy,” was dropped on Hiroshima in 1945, killing tens of thousands of people instantly.
🔔 The Meaning Behind the 8:15 AM Siren
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The siren lasts for about one minute
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It is a citywide moment of silence to remember those who died
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People across the city stop, bow their heads, and reflect — even in train stations or on the street
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Please respect the silence if you are present in Hiroshima at that time
🕊 The Peace Memorial Ceremony at Hiroshima Peace Memorial Park
Every year on August 6, a major ceremony is held at Hiroshima Peace Memorial Park.
This includes:
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Speeches by the Prime Minister of Japan and international leaders
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A moment of silence at 8:15 AM
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Prayers for peace, musical performances, and offerings
Because of the presence of high-level officials, including foreign dignitaries, security is extremely tight:
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Police officers from across Japan are deployed to Hiroshima
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Roads near the Peace Park are often closed or restricted
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Crowds are large — especially around 6:30 to 9:30 AM
☀️ Be Careful: August 6 Is Extremely Hot
In recent years, Hiroshima has experienced extreme summer temperatures:
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August 6, 2024:
9:00 AM – already 30.8°C (87°F)
Later in the day – reached 35.3°C (95.5°F) -
High humidity and concrete heat can make it feel even hotter — like a sauna
Even many locals are taken to the hospital with heatstroke on this day.
Standing in the sun for long periods can be dangerous — even life-threatening.
✅ Tips If You Plan to Attend the Ceremony
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Bring water (or OS-1, a rehydration drink sold at drugstores)
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Use a sun umbrella or wear a hat
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Wear light, breathable clothing
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Stay in the shade, especially under trees
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Arrive early if you want to watch, but be ready for crowds and security checks
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If you feel unwell, seek help immediately — don’t try to push through the heat
🧊 Most Japanese people, especially women, use parasols in summer. Recently, even men use black umbrellas for sun protection. It really helps — try it!
🚦 Please Remember
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August 6 is not a normal day in Hiroshima
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Expect heavy crowds, especially around Peace Memorial Park
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Public transportation may be affected by security zones
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Stay respectful, hydrated, and safe
Stay Safe in Hiroshima’s Summer: What You Must Know About Heatstroke in Japan
