Hakuin Zenji is one of Japan’s most celebrated Zen masters. Tradition tells us that he single-handedly revived Rinzai Zen in Japan. He was an artist, calligrapher and writer, as well as being a Zen master. He said that writing is verbal prajna and his writings are vigorous, courageous, and always to the point. The Chant in Praise of Zazen, Zazen Wasan, is justifiably one of his best-known works.