if his researches were correct , restrictions on space of land may have been the current law when " shoku nihongi " was compiled , and it increases the possibility that the stipulation was selected and put on record in exactly the same form . もし、これが正しければ『続日本紀』編纂時には面積制限が現行法であり、その規定をそのまま採録した可能性が高くなる。
his trading activities were reported to kofuku-ji temple after their return and put on record in detail in such documents as " daijoin jisha zojiki (miscellaneous records of the daijo temple and shrine )" and the " tosen nikki " (lit . " tosen journal " ) by jinson of daijo-in , which serve as valuable historical data to describe the actual activities of trading between two countries in those days . これらの西忍の交易活動は、帰国後興福寺に報告され、大乗院主尋尊によって「大乗院寺社雑事記」「唐船日記」などに詳細に記されており、当時の日明勘合貿易の実際を知る上での貴重な史料となっている。
