A preprint co-authored by Daichi Suzuki (Publicly Offered Research Group - First Period) and Hayato Saigo (A01) has been published in PhilSci-Archive! The title is "A Category-theoretic Interpretation of the Homology Concept in Biology". This paper aims to formulate the homology concept in biology based on category theory. The preprint can be viewed here. As applying the homology concept to consciousness is critical for clarifying its evolution, this paper is expected to provide a key theoretical foundation for elucidating the evolutionary aspects of the qualia structure.