The consequences of Ouchi's radiation exposure were catastrophic. In the days and weeks following the incident, he experienced acute radiation syndrome (ARS), which led to various severe health issues:
- Severe burns and skin damage
- Loss of hair
- Internal organ failure
- Immune system collapse
- Psychological trauma and depression
Hisashi Ouchi’s condition deteriorated rapidly, and he required extensive medical treatment, including blood transfusions and immunotherapy. His struggle became a focal point for discussions on the ethics of nuclear energy and worker safety.