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Sadako Sasaki

Sadako Sasaki is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Sadako Sasaki rather than just read about it. In short: Sadako Sasaki (佐々木 禎子, Sasaki Sadako; January 7, 1943 – October 25, 1955) was a Japanese girl who became a victim of the atomic bombing of Hiroshima by the United States. She was two years of age when the bombs were dropped and was severely irradiated.

Sadako Sasaki — main illustration
Sadako Sasaki — illustration

Key takeaways

  • Sadako Sasaki belongs to physics; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Sadako Sasaki to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Sadako Sasaki from memory before moving on to harder problems.

Reference excerpt

Sadako Sasaki (佐々木 禎子, Sasaki Sadako; January 7, 1943 – October 25, 1955) was a Japanese girl who became a victim of the atomic bombing of Hiroshima by the United States. She was two years of age when the bombs were dropped and was severely irradiated. She survived for another ten years, becoming one of the most widely known hibakusha—a Japanese term meaning "bomb-affected person". She is remembered through the story of the more than one thousand origami cranes she folded before her death. She died at the age of 12 on October 25, 1955, at the Hiroshima Red Cross Hospital.

Event Sasaki was at home, about 1.6 kilometres (1 mi) away from ground zero, when the United States dropped an atomic bomb on Hiroshima. She was blown out of the window and her mother ran out to find her, suspecting she might be dead, but instead finding her two-year-old daughter alive with no apparent injuries. While they were fleeing, Sadako and her mother were caught in black rain. Her grandmother ran back inside and died near the house, apparently trying to escape fires by hiding in a cistern.

Aftermath Sasaki grew up like her peers and became an important member of her class relay team. In November 1954, Sasaki developed swellings on her neck and behind her ears. In January 1955, purpura had formed on her legs. Subsequently, she was diagnosed with acute malignant lymph gland leukemia (her mother and others in Hiroshima referred to it as "atomic bomb disease"). She was hospitalized on February 21, 1955, and given no more than a year to live. Several years after the atomic explosion, an increase in leukemia was observed, especially among young children. By the early 1950s, it was clear that the leukemia was caused by radiation exposure from the bomb. She was admitted as a patient to the Hiroshima Red Cross Hospital for treatment and given blood transfusions on February 21, 1955. By the time she was admitted, her white blood cell count was six times higher than the average child's levels.

Origami cranes In August 1955, she was moved into a room with a girl named Kiyo, a junior high school student who was two years older than her. Shortly after, cranes were brought to her room from a local high school club. Sasaki's father told her the legend of the cranes and she set herself a goal of folding 1,000 of them, which was believed to grant the folder a wish. Although she had plenty of free time during her days in the hospital, Sasaki lacked paper, so she used medicine wrappings and whatever else she could scrounge; including going to other patients' rooms to ask for the paper from their get-well presents. Her friend Chizuko also brought paper from school for Sasaki to use. A popular version of the story is that Sasaki fell short of her goal of folding 1,000 cranes, having folded only 644 before her death and that her friends completed the 1,000 and buried them all with her. (This comes from the novelized version of her life Sadako and the Thousand Paper Cranes.) However, an exhibit that appeared in the Hiroshima Peace Memorial Museum stated that by the end of August 1955, Sasaki had achieved her goal and continued to fold 300 more cranes. Sasaki's older brother, Masahiro Sasaki, says in his book The Complete Story of Sadako Sasaki that she exceeded her goal.

Death

During her time in the hospital, her condition progressively worsened. Around mid-October 1955, her left leg became swollen and turned purple. After her family urged her to eat something, Sasaki requested tea on rice and remarked, "it's good". She then thanked her family, those being her last words. With her family and friends around her, Sasaki died on the morning of October 25, 1955, at the age of 12. After her death, Sasaki's body was examined by the Atomic Bomb Casualty Commission (ABCC) for research on the effects of the atomic bomb on the human body before she was cremated.

… excerpt ends here. Continue reading the full article.

Illustrations

Sadako Sasaki illustration
Sadako Sasaki: Sadako Sasaki in her casket, her body almost completely covered by flowers.
Sadako Sasaki in her casket, her body almost completely covered by flowers.
Sadako Sasaki illustration
Sadako Sasaki illustration
Sadako Sasaki illustration

Worked examples

Example 1 — a first encounter with Sadako Sasaki

Start with the simplest possible case. Write down what Sadako Sasaki claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Sadako Sasaki before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Sadako Sasaki ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Sadako Sasaki

In research
Sadako Sasaki appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Sadako Sasaki in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Sadako Sasaki is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1943 births, 1955 deaths, Anti–nuclear weapons movement, so understanding it makes those chapters shorter.
In everyday life
Look for Sadako Sasaki outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Sadako Sasaki in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Sadako Sasaki means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Sadako Sasaki out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sadako Sasaki in simple terms?

Sadako Sasaki (佐々木 禎子, Sasaki Sadako; January 7, 1943 – October 25, 1955) was a Japanese girl who became a victim of the atomic bombing of Hiroshima by the United States. She was two years of age when the bombs were dropped and was severely irradiated.

Why does Sadako Sasaki matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Sadako Sasaki?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Sadako Sasaki.

Tags

  • 1943 births
  • 1955 deaths
  • Anti–nuclear weapons movement
  • Child deaths from disease
  • Child victims of war
  • Deaths from leukemia in Japan
  • Hibakusha
  • Japanese children
  • Origami artists
  • People from Hiroshima
  • War crimes against children in World War II

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