We describe two cases of cardiac failure in elderly patients successfully treated with shimbuto. Case 1 was that of an 84-year-old man with severe aortic stenosis and liver cancer. His cardiac failure led to repeated hospitalization. After taking shimbuto, his pleural effusion decreased and cardio thoracic ratio improved. Case 2 was that of an 84-year-old man who was hospitalized because of cardiac failure and aspiration pneumonia after undergoing an operation for lung cancer. After taking shimbuto, his urine volume increased and cardiac failure improved. No notable adverse events were observed in any of the abovementioned cases. It is important that kanzo is not included in shimbuto to demonstrate risui action, hence the use of other “ho” formulations should be avoided. These cases suggest that shimbuto is indicated for elderly patients with cardiac failure under terminal care.