This article is a general study on Japanese Information Disclosure Law,which was passed on May 7,1999.It discusses the background behind the enactment of the law.It points out that under people sovereignty and democratism,any person may request to the head of an administrative organ the disclosure of administrative documents held by the administrative organ concerned.This article also discusses basic structure of information disclosure system in Japan,and explains the concept of "administrative document",the exception of information closure in the law.Then it illustrates the procedure for requesting disclosure and the implementation method of disclosure.Finally,this article also gives a detailed explanation on information disclosure remedies in Japan,which includes appeal,consultation and review.