Koganegawa has a large, muscular build, and a towering height of 193 cm, earning him a place in the new Iron Wall. He has sharp eyes with small pupils. His hair is mostly blond, except for the middle of his fringe, which is black and styled up. His eyebrows are the same color as his fringe, implying that his hair is dyed blonde. He currently wears the number 7 jersey on the team.