I-shan I-ning (1247-1317)

A Chinese Ch'an monk whom the Yüan dynasty government sent to Japan as a missionary. After an initial misunderstanding in which he was imprisoned by the Japanese court as a spy, he was later recognized as a great teacher and attracted many of the brightest Buddhist clerics as his students.

A Dictionary of Buddhism, Oxford University Press, 2003, 2004 (which is available in electronic version from answer.com)