Wabi-sabi is a beauty of things imperfect, impermanent, and incomplete. It is the beauty of things modest and humble. It is the beauty of things unconventional.
The concepts of wabi-sabi correlate with the concepts of Zen Buddhism, as the first Japanese involved with wabi-sabi were tea masters, priests, and monks who practiced Zen. Zen Buddhism originated in India, traveled to China in the 6th century, and was first introduced in Japan around the 12th century. Zen emphasizes "direct, intuitive insight into transcendental truth beyond all intellectual conception." At the core of wabi-sabi is the importance of transcending ways of looking and thinking about things/existence.
Material characteristics of wabi-sabi: