(1 December 2015) The Web Archiving Project (WARP) of the National Diet Library (NDL) has been archiving websites in Japan since 2002. In October 2015, WARP archived its 10,000th website in 13 years. The number of archived files is 3.6 billion, comprising 630 terabytes of data as of the end of October 2015. WARP undertakes bulk archiving of public sector websites under the NDL Law, and also archives private sector websites with the permission of their webmasters. The NDL will continue to archive websites, thereby preserving past information for future access by anyone.
The announcement is here.