noun
standing to sue; capacity to be a party
Legal term referring to a person's or entity's ability to be a party in a lawsuit, i.e., having the legal capacity to sue or be sued.
法人にも当事者能力が認められる。
A corporation also has the capacity to be a party to a lawsuit.
当事者能力がないと、裁判
Without standing to sue, one cannot file a lawsuit.