This is a beautiful Zen Story.
Kakua was the first Japanese to study zen in china, and while he was there he accepted the true teaching. When he was in China he did not travel. He lived in a remote part of a mountain and meditated constantly.
Whenever people found him and asked him to preach, he would say a few words, and then move to another part of the mountain where he could be found less easily.
When Kakua returned to japan, the emperor heard about him and asked him to come to court to preach Zen for the edification of himself and his subjects.
Kakua stood before the emperor in silence. He then produced a flute from the folds of his robes, blew one short note, bowed politely, and disappeared. No one ever knew what became of him.
