There is something bracing, almost exhilarating, about a catastrophe. Like a typhoon, it sweeps away the small constraints of daily existence. It opens up the landscape to bold moves and rearrangements that would be unthinkable in normal times.

It was in such an atmosphere that they buried Shohei. The war was escalating. Shortly afterward, American bombs fell on Kobe, Mrs. Kobayashi’s birth city. Vast areas of the city burned down in the fires.

Mrs. Kobayashi’s family, the Sosetsus, barely escaped with their lives. Hitching a ride on a farmer’s oxcart, they made their way inland to Kyoto with nothing but the clothes on their backs. “We ran through the city with our coats over our heads,” Mrs. Kobayashi’s mother told them. She was freshly bathed, dressed in one of her daughter’s kimonos. Her air was so refined that it was hard for Mrs. Asaki to imagine her running at all. “Look,” she said, “where the embers burned through.” Everyone stared in awe at the scorch marks on the Sosetsus’ padded silk coats.

“What about your ships…?” asked Mrs. Asaki. The Sosetsus’ import business was the mainstay of their wealth.

“Gone,” said one of the sons bitterly. “All except two that were out at sea. Our entire fleet was in that harbor.”

Mrs. Asaki was enthralled in spite of herself. An entire fleet, destroyed! Her in-laws had sunk from wealth to poverty in the blink of an eye.

“I can’t get over it,” she said later that night to her husband. “What a change of fortune!”

“It could have been us,” he said in dazed wonder.

“Yes, it could have been us…” They were silent, pondering the upheaval the war had brought. The Asakis were doing better than their neighbors, even in this time of food rationing. Mr. Asaki was a high school superintendent. His public office gave him access to black-market channels in the prefectural bribery system. And Mrs. Asaki had farming relatives out in the country, a fact that had once embarrassed her.

“They can’t possibly squeeze into that little house,” Mr. Asaki said.

“Of course not!” There were six of them: Mrs. Kobayashi, her mother, three siblings ranging in age from thirteen to twenty, and four-year-old Yoko. When Mrs. Kobayashi delivered her baby, there would be seven in all. “She and Yo-chan should move in with us,” she said, “till that family gets back on their feet.”

She ran her eyes over the too-large house—the wide expanse of tatami matting, the long empty halls. She and her husband had always hoped for children. But now, on the brink of forty, she knew it was never going to happen.

“It’ll be nice,” she said, “having small children here.”

The months passed. Japan surrendered in 1945. Mrs. Kobayashi gave birth to a baby girl called Masako.

One day Mrs. Sosetsu paid the Asakis a formal call and announced they were moving back to Kobe. “We have a hard road ahead,” she said, “but Kobe is our home.” Her bows were deep and controlled, but the emotion in her face was real. “We can never repay you for what you’ve done,” she said. “We’ll never forget your kindness.”

“Not at all, not at all,” said Mr. Asaki. He and his wife bowed back in unison. “We wish you all the best.”

“We wish you all the best,” echoed Mrs. Asaki. This house was going to be lonely without little Yoko and the baby.

That night at dinner she asked, “Will you be moving back to Kobe as well?” Her eyes shifted from her sister-in-law to the baby strapped on her back. Masako was fast asleep; her cheek, round and soft as a dumpling, lay against her mother’s shoulder.

“I’d like to,” said Mrs. Kobayashi wistfully. “But there aren’t any jobs in Kobe for someone like me. My children and I would just be a burden.” She paused. “No no, Yo-chan,” she told the little girl, who was reaching across the table with her chopsticks. “If you want more radishes, say, ‘Please pass the radishes.’”

“Please pass the radishes,” said Yoko obediently.

“When this rationing is over,” said Mr. Asaki jovially, “we’ll have meat again! And fresh fish from the coast! What do you think about that!”

The child looked at him blankly, then turned her attention to the boiled radishes.

“I’ll move back across the street and get an office job,” said Mrs. Kobayashi.

“Yes,” said Mrs. Asaki, “and I can look after the children.”

Mr. Asaki, who came from a traditional Kyoto family, looked up sharply from his rice bowl. “Times may be bad,” he said, “but not so bad that a woman under my care has to go out in the workplace to be ordered about by strangers. What you need to do is get remarried.”

Mrs. Kobayashi looked young and trapped. Mrs. Asaki’s heart went out to her. Ever since Shohei died, the two women had become close. But Mrs. Asaki’s sympathy was still tinged with a smug sort of pleasure in knowing that her sister-in-law’s charmed days were now behind her.

Her husband, as if thinking along these same lines, continued. “You’re not a privileged young girl anymore, working for pocket money.” Then, more gently, “I know something of this world. I know it isn’t kind or respectful to women over a certain age who work for their food. And you’d barely support your children on what you’d make.”

“He’s right, dear,” said Mrs. Asaki. “Servitude in some office isn’t the answer.”

They were silent. Baby Masako flung out an arm in sleep. Little Yoko hunched over her bowl, picking out one grain of rice at a time with her chopsticks.

“Besides,” said Mr. Asaki, “how many multinational companies are there in Kyoto anyway?” He leaned back and took a swallow of tea.

“Let’s think on it, ne, dear?” said Mrs. Asaki soothingly. “We’ll put our heads together and come up with a really good plan.”

It was then that the wheels in her mind began to turn.