In the beginning, those were also called 'kaigo' (post), 'shutsuno' (receipts and expenditure) and 'azukari' (an additional post to the chief of Naizenshi), but as the documents to deal with increased and started to include even lawsuits, all of them began to be called kumon uniformly.
当初は「開闔（かいごう）」・「出納（しゅつのう）」・「預（あずかり）」などとも呼ばれていたが、次第に取扱う文書が多くなり訴訟なども担当するようになると、それらも「公文」と称せられる様になった。