日本入元僧友山士偲和天岸慧广的度牒有明显的伪造嫌疑。此前入宋偷渡僧以及赴日宋商携带多张“公凭”或“公凭”上年号颠倒的现象也时有发生。之后又出现日本在与朝鲜的交往中私刻官印伪造国书冒充日本国王使节的现象。中日两国这种在政治、经济、文化领域中“非国家行为”的伪造文书现象是一个值得研究的课题。 Japan into a monk Mount Shantou and Tian Fu Hui Guang degrees have obvious forged suspects. Before the entry into the Song Dynasty smuggling Monk and Japan to carry more than the Song Dynasty business “public by ” or “public by ” last year reversed the phenomenon also occur. It was followed by the Japanese government’s personal contacts with North Korea, which stole the official seal of forging the kingdom to impersonate the Japanese envoy. This phenomena of forging documents such as “non-state acts” in the political, economic and cultural fields between China and Japan is a topic worthy of study.