His thoughts developed from the pure experience theory (which theorized the 'state of nothing') of Zen Buddhism into the self-consciousness theory (one develops himself by recognizing his pure experience), logicalness theory as a field in which consciousness, such as awareness, exists and absolutely paradoxical identity theory (the field is finally integrated religiously and ethically).
その思索は禅仏教の「無の境地」を哲学論理化した純粋経験論から、その純粋経験を自覚する事によって自己発展していく自覚論、そして、その自覚など、意識の存在する場としての場の論理論、最終的にその場が宗教的・道徳的に統合される絶対矛盾的自己同一論へと展開していった。