After founding the subjectivity of living organism in its relation to the life itself, Kimura tries to re-locate the subjectivity of living organisms in the place of Gestaltkreis (von Weizäcker’s notion), where the perception and movement makes a circular-unit with the surrounding environment.
A living organism maintains its subjectivity in its relation to the surrounding environment. By definition, something alive has its own spontaneous movement toward the environment (when it loses movement, it appears as dead). Movement is caused through the encounter with the environment and informs perception toward it.
For example, my movement of reaching is caused when I see a ball rolling toward me, and my perception of the ball is permeated by my possible movements of reaching, grabbing, and throwing it. The subjectivity is maintained, based on the appropriate cycle of perception and movement toward the environment. It is not autonomous such thing as "modern ego".
It is possible to say that his view of subjectivity is enactive. In Kimura’s view, the subjectivity is originally action-based and action-oriented. And of course, the action is something that occurs when a living organism encounters with a certain environment. Subjectivity is not autonomous or pre-given thing. Kimura says:
“As a living organism encounters with the environment, the subject is realized through this encounter. Thus, if this encounter is destroyed for some reason, the subject will also disappear at that moment.”
[Kimura, B. (2005). Aida. Tokyo: Chikuma Shobo, p.22 (translation by ST)]
Here, it should be confirmed that the subjectivity itself has its foundation in between (aida) of a living organism and the environment. In case of human, it would mean that the subjectivity of each human being is realized through the encounter with the world. This view would partly coincide with the notion of “Being-in-the-world”.