What is the theme of "He-y Come On Ou-t!" by Shinichi Hoshi and what is the author's purpose for writing the story? The authors purpose for writing it.
There is a strong ecological message in this story. The people disregard the environment and think that they have found an easy solution for all of the harmful chemicals they have created and all the dangerous waste they have generated. However, it turns out that their thoughtlessness for the well being of the earth is going to revisit them as their waste rains down on their heads. The author wants the reader to think about our actions as we quickly pollute and damage our environment. A few decades ago, people just dumped trash into the ocean because they couldn't see the damage it would do in the water, and just wanted to get rid of it. It seemed like an easy solution then, just throw it in and it disappears. Throughout history we've just dumped our waste in places and watched it disappear, but it never just "disappears." It always comes back to affect us in some detrimental way, whether it kills off species of animals or pollutes our water or depletes our ozone. This story illustrates the very thing that we do, we dump our problems and hope that they'll disappear. No one wants to think about it, but Hoshi's story reminds us that we can't hide our mistakes so easily, because it will come back to us somehow.
The above answer is absolutely accurate, but the story can also be connected to a broader theme beyond the ecological message. While many people do use the hole to get rid of trash that will significantly damage the environment (such as nuclear waste and chemicals), other people use it to get rid of things they simply do not want to think about, see, or have others see or know about. For example, the government uses the hole to get rid of "unnecessary classified documents," women use it to get rid of mementos of previous lovers, and criminals use it to get rid of evidence.
This connects the idea articulated above, that people have polluted without thinking about the environment, with a greater message: we prefer to do things in general without thinking about or acknowledging the consequences. Once we have done something, we want to be "rid" of it. Even if it was something we wanted to hold on to, such as a love letter, once we "move on" from it, we want it out of sight— not only for ourselves, but also so others do not see the parts of our past we don't want in the open. The hole speaks to the human desire to bury the past, and that doing so is ultimately impossible.