Aim: To elucidate the common and different points between sarcopenia and frailty in chronic liver damage (CLD). Patients and Methods: Patients with both grip strength decline and skeletal muscle index decline were regarded as sarcopenia. Frailty was defined as a syndrome in which 3 or more of the following criteria were met: i) exhaustion, ii) body weight loss, iii) slow walking speed, iv) muscle weakness, and v) low physical activity. Results: Sarcopenia and frailty were identified in 52 patients (15.2%) and 46 (13.5%), respectively. The prevalence of sarcopenia and frailty was well stratified according to age and the liver cirrhosis (LC) status. In the multivariate analysis, we identified significant factors for sarcopenia: i) age, ii) LC, iii) body mass index and iv) extracellular water (ECW) to total body water (TBW) ratio, while only the ECW to TBW ratio was significant for frailty. Conclusion: Sarcopenia and frailty in CLD should be separately evaluated. In individuals with chronic liver damage (CLD), metabolic functions are frequently damaged leading to several nutritional disorders, including protein-energy-malnutrition, or muscle abnormalities (1). Since sarcopenia, as assessed by muscle mass decrease and muscle strength impairment in patients with CLD, can be related to falls, poor quality of life or poor prognosis, it has become a very interesting topic to examine for physicians (2-8). Sarcopenia is one of the most common consequences found in patients with liver cirrhosis (LC), affecting 30% to 70% of LC patients, and it can be a main determinant for the incidence of hepatic encephalopathy in LC patients (1, 9, 10-13). Japanese CLD patients can now be found in aging populations, and this fact is also a crucial public health issue since aging itself can cause sarcopenia (14-16). To avoid unfavorable consequences related to sarcopenia one needs to assess this disease as a condition with a systemic involvement (17-19). Improving physical activity or nutrition and adequately managing any underlying diseases are essential steps for avoiding sarcopenia (6). Frailty is a concept globally used in geriatrics that precedes disability, and is defined as a condition of increased vulnerability associated with physiological decline (20-22). Originally, it was proposed to identify elderly people at an elevated risk of adverse health outcomes, dependencies, falls, disabilities, and mortality (20-22). Frailty is determined based on the evaluation of physical, functional and cognitive abilities. The frailty phenotype is defined as the presence of 3 or more of the following criteria: i) body weight (BW) loss, ii) self-reported exhaustion, iii) skeletal muscle function decline, iv) slow walking speed (WS) and v) low physical activity (23, 24). Sarcopenia is an important component of frailty (22). Aging is indeed closely linked to changes in body composition, especially skeletal muscle mass decline, resulting in disability and mortality (14, 16, 24). While any chronic organ dysfunction can also lead to physiological vulne...