Abstract
It has already been three years since COVID-19 forced the accelerated introduction of telework. Although telework continues to be established in society even as the pandemic recedes, many companies are returning to on-site work. Telework has led to the emergence of legal issues relating to work styles as well as problematic issues identified by human resources departments. Therefore, I describe here the necessity of telework and the issues in its establishment, improved well-being due to telework, and management methods that should be thought of as sustainable.