Several governmental offices were installed in the palace, including the National Diet Library, which was founded in 1948.

It is one of the predecessors of the current National Diet Library.

It possesses some items which even the National Diet Library does not have.

Only one copy was left in the National Diet Library.

Only one copy is in the National Diet Library.

Jūzaburō's work is held in the collection of the National Diet Library.

After retirement from the university, he was appointed to the Director of National Diet Library in 2007 and held the position until 2012.

The National Diet Library has two main facilities.

In 1948 he became the first librarian of the National Diet Library, a post he held until his death in 1959.

As of 1978, the National Diet Library used Kunrei-shiki.