BACKGROUND: Heart failure (HF) hospitalization is increasing in Japan's aging population. Current guidelines recommend daily biometric monitoring for patients with HF to facilitate early clinical intervention. However, promoting patient self-management remains insufficient. Therefore, we assessed the usefulness of the LAVITA telemonitoring system, which automatically obtains and stores the biometric data of patients with HF via wireless devices. METHODS AND RESULTS: This prospective, single-arm, multicenter cohort study enrolled patients with HF. Patients were introduced to the LAVITA telemonitoring system and trained to measure body weight, blood pressure, pulse rate, oxygen saturation (SpO CONCLUSIONS: The LAVITA telemonitoring system had high measurement rates for the biometric data of patients with HF, including elderly patients. Hence, it can possibly improve patient self-management and facilitate early clinical intervention.