The Zombie Stack Exchanges That Just Won't Die
In the USA, the National Archives and Records Administration (NARA) is an independent agency of the government, charged with preserving government and historical records.
In Japan, is there a similar agency?
Nicolas Raoul
You're probably looking for the National Archives of Japan.
Agreed. Though you may also find useful materials at the National Diet Library (http://www.ndl.go.jp/en/index.html) which is the equivalent to the US Library of Congress.