Easy Learning Secrets Revealed (by Daigaku Kato / Kigen Shobo) Among Daigaku Kato's works, this book delves particularly into the "arcane secrets," containing the core of judgment in I Ching divination, how to interpret symbolic meanings, and the logic behind yin and yang and the five elements. It includes many "secret" interpretations that are rarely discussed in his other books. This is a rather advanced text, suitable for those who have already studied the I Ching to some extent and wish to deepen their understanding.