We investigated the relationship between Karoshi (death due to overworking) and bathing. Three apparently healthy persons seem to have died of karoshi during bathing. All three pesons had complained of a severe fatigue and poor physical condition. We estimated that the thermal stimulation and hydraulic pressure during bathing would further injure the auto-nervous and endocrine systems that had been ruined by severe overwork. We also estimated that these injuries would cause Karoshi by means of lethal arrhythmia or acute coronary syndrome. Our study suggests that the cases of sudden death during bathing include the cases of Karoshi.
