noun
National Diet Library; Library of Congress
Refers to Japan's national library, the National Diet Library. The gloss 'Library of Congress' is a rough equivalent for English speakers, but the institution is distinct.
See also: 国立国会図書館
国会図書館で調べ物をした。
I did some research at the National Diet Library.
国会
The National Diet Library has the largest collection of books in Japan.