No one knows what became of Kakua after he left the Emperor’s presence. Here is the story:
Kakua was the first Japanese to study Zen in China. He had little use for travelling, for he took his meditation seriously. Whenever people found him out and invited him to preach, he would say a word or two and escape to another part of the forest where he would not be disturbed.
On his return to Japan the Emperor heard of him and commanded him to preach at court. Kakua stood silent and helpless before the King. Then he pulled out a flute from the folds of his robe, played one short note on it, bowed profoundly to the King and disappeared. Confucius says: “Not teach ripe person: waste of per-son. Teach not ripe person: waste
THE SONG OF THE BIRD
Anthony de Mello