At the end of the story, it says that "when the doctors came, they said she died of heart disease-- of a joy that kills." They assume that her weak heart could not handle the happiness she felt when her husband walked through the door alive. They do not know- or refuse to acknowledge- the actual cause for her death.
<h2><em>It's a developed country with elaborate infrastructure, high quality of life, and technological innovation. Japanese learned to work and build efficiently and to focus on mental capital rather than material wealth. Japanese relied on economic liberalism and private industry to make the necessary technological leaps.</em></h2>
