Patients with the best supportive care often get worse and worse, and it is very difficult to improve their symptoms. As cancer is currently a leading cause of death in Japan, and adequate control of the cancer-associated pain is important to improve the quality of life (QOL) in cancer patients. Pain caused by bone metastasis is particularly difficult to control, and the strong analgesic medication which it requires is generally difficult to control. Such metastases result in reduced mobility and markedly reduced activities of daily living (ADL) and the QOL of patients. Our patient was a 67-year-old man who had been treated for metastasis from the left kidney to cancer of the right pelvic bone ; palliative chemotherapy and mild treatment were provided for his sharp pain, but control of his sharp pain was insufficient. Here we expand on our experience in a patient with bone metastasis caused by renal cell carcinoma successfully treated with Kampo medicine, using acupuncture and decoction extract.