Corbicula leana inhabits Japan. Breeding the Mashijimi gives the following idea. "The problems of the earth are unreasonable unless they are judged by adding the judgment of the invisible world to the judgment of the visible world." Mashijimi changed my way of thinking. And I believe in the results of my experiments. However, this idea has never been scientifically proven and is my hypothesis. I am confused about my judgment these days. For example, Corona has been popular in Japan for about a year and a half. Every day, thorough public prevention and infection information are reported. But these judgments are the judgments of the visible world. I think we need to add invisible world judgment・information. Gargling, which has continued since the Heian period when humans did not know about bacteria and viruses, was a Japanese culture of cold prevention. I discovered an R gargle method to prevent influenza by changing the water used for the "gargle" to steam. I wrote in this book that if you are satisfied with the content, please use it at your own risk. And I added information about the invisible world to my flu prevention R gargling method so that it could be applied Corona prevention. And this book was translated into English by a translator.