Abstract
After a series of major events such as natural disasters, nuclear accidents and huge environmental incidents, various actors―individuals and groups―who played a significant role in the aftermath of these events suddenly gained attention and were given voice. However, interestingly enough, the actors and their actions grow less prominent with time and thus it becomes more difficult to apprehend that the world is being formed through actions by various kinds of actors. If we wish to avoid this unfortunate outcome, we should attempt to learn more about the actors and their dynamic relationship with the context in which they act. Here I will examine the ideas and theories of Alain Touraine（Sociology of Action） that provide an original systematization of theories focused on actors based on action-centered approaches （Miyajima 2012） that have been accepted in societies that have undergone dramatic changes.
