The need for Japkasai is increasing day by day, but the background to this is the problem of residual pesticides and the problem of food additives. This is because these harmful substances adhere to the testicles located outside the body. The male hormone "testosterone" is made up of 95% of the testicles. When this happens, it becomes difficult for male hormones to be produced, and the physical condition deteriorates, causing depression, back pain, and erectile dysfunction. Men become more feminine and the birth rate declines. Originally, men have a structure that is harder to detox than women. Women have regular periods and have children, so it's relatively easy to detox, but men can only detox a little bit. There are many pitfalls around us that can lead to health hazards. There is a flood of "food additives," "genetically modified crops," "pesticides," "herbicides," and "fructose," which reduce the natural healing power, and it is an era in which we cannot even live a life unrelated to such things. In particular, the effects on reproduction are strong, and infertility problems and adverse effects on fertility have been clarified in numerous experiments. This means that the demand for Japkasai will continue to grow. The spread of "Japkasai" will eventually improve the world.