It is predicted that maximum use of distributed energy resources (DERs) on the consumer side will happen, such as contribution to the appropriate operation of power grid, environmental issue, and resilience requirement. Ensuring resilience against power outages is an important social need following a natural disaster. Generally speaking, there are three types of resilience: "self-help,""mutual help,"and "public help."This study especially focuses on methods for realizing mutual help-type resilience and several approaches are discussed. Then a distributed and coordinated energy management system to realize mutual help-type resilience is proposed and compared with several approaches from author's previous studies. With the numerical simulations, the proposed method that deals with a large number of DERs as multi-agent system and forms agent group step by step with checking agent's resilience performance by a distributed coordinated energy management scheme was shown to have good resilience performance.