Schistosoma japonicum is a trematode worm that causes liver and gastrointestinal disease in humans. It is endemic to parts of China, Japan, the Philippines, and Indonesia. The worm has a complex life cycle involving freshwater snails as intermediate hosts and humans as definitive hosts. Eggs are passed in feces and hatch into larvae that infect snails, developing into cercariae that penetrate human skin, mature into adult worms in the liver and intestines, and lay eggs perpetuating the cycle. Chronic infection results in liver fibrosis and portal hypertension. Symptoms range from itching and rash during acute infection to gastrointestinal bleeding and organ damage in chronic cases. Diagnosis involves microscopic identification of eggs