In this article, I have examined Nishida’s philosophical development in his middle period (from April 1925 to October 1932), taking two key facets - immanence and transcendence - into account. It is worth noting that two key facets can form the following four patterns: first, “immanence assimilating transcendence,” second, “transcendence assimilating immanence,”third, “immanence separated from transcendence,” and fourth, “transcendence separated from immanence.” I argue that Nishida’s middle period can further be divided into two: the first half (from April 1925 to December 1929) and the latter half (from January 1930 to October 1932). Nishida’s thought in the earlier period (from his earliest days through March 1925) was mainly concerned with “immanence assimilating transcendence,” and yet his focus gradually shifted to “transcendence assimilating immanence.” In the first half of the middle period, the transition of this kind deepened more. As a consequence, “transcendence assimilating immanence” became dominant, while “immanence assimilating transcendence” came to occupy a secondary place. It is notable, however, that this relation was inverted in the latter half of the middle period: “immanence assimilating transcendence” turned to be primary, when “transcendence assimilating immanence” worked secondarily
