In the late 1940s, Kim Koo devoted himself to the cause of Korean reunification. He firmly opposed the establishment of separate governments in the North and South, calling instead for a unified government through nationwide elections supported by the United Nations.
Despite opposition, he traveled to Pyongyang in April 1948 to attend the South-North Leaders’ Conference, where both sides declared their commitment to the withdrawal of foreign troops and the creation of a democratic provisional government.
Even after separate governments were formed, Kim Koo continued to advocate for national unity, emphasizing that true independence could only be achieved through solidarity among Koreans. He envisioned a cultural nation that harmonized the best of global civilization with Korea’s own traditions, contributing to world peace through education and sound political ethics.