What is Johu Yongsin (Climate Useful God)?
Johu Yongsin addresses the seasonal temperature and moisture of the chart. A person born in deep winter (Water dominant season) may need Fire to warm the chart; someone born in midsummer may need Water to cool it. This Useful God ensures the Day Master operates in a temperate, productive environment. Johu is considered especially important in classical Myungri because even a strong Day Master struggles in hostile climate conditions.