Kisho-mon during the Middle Ages -Investigation of the written pledges from the standpoint of diplomatics

在日本中世纪，有一种用来宣誓的文件叫做“岸书门”。其中包括誓言的细节和“如果我说谎，我将受到神明和佛陀的惩罚”的条款。在此次调查之前，据说最古老的文献是保存在奈良东大寺的1148年的文献。然而，我提出了一种新的理论，即在中世纪之前就开始制作Kanjo-gata Kisho-mon。该文件包括邀请神灵和佛陀的条款，誓言的细节，以及关于惩罚的相同条款。2007年，在琵琶湖北岸的盐津港遗址中发现了1137年制作的《木函》。我们得出结论，这是一个Kanjo-gata岸门。这次调查用新的来源修正了岸门的开头。

During Japanese Middle Ages, there were documents to make pledges called "Kisho-mon". They include details of pledges and the term "If I made a lie, I would be punished by Gods and Buddha". Before this investigation, it was said that the oldest document is the one kept in Todaiji-temple, Nara and the document was made in 1148. However, I set up a new theory that Kanjo-gata Kisho-mon was started to be made before the Middle Ages. The document includes the term to invite Gods and Buddha, details of the pledge, and the same term about the punishment.In 2007, a Mokkan written as it was made in 1137 was found in the remains of Shiozu port located on north shore of Biwako lake. We concluded it is a Kanjo-gata Kisho-mon. This investigation corrected the start of Kisho-mon with the new source.