I Ching

The I Ching (Classic of Changes or Book of Changes), also known as the Yi Jing, Yijing, or I Ging, is one of the Five Classics, the fundamental books of Confucianism.It is over 3000 years old (the symbols used in divination are over 5000 years old), making it both one of the oldest surviving books in the world, and one of the oldest forms of divination.

I Ching studies in Japan took on new importance in the Edo period, during which over 1,000 books were published on the subject by over 400 authors. The majority of these books were serious works of philology, reconstructing ancient usages and commentaries for practical purposes.