The national library of Japan. In the series, this is where Yomiko Readman is found by the Paper sisters and Nenene at the end of "In the Gray Light of the Abyss". Yomiko had been living at this library for the past 5 years with Nancy Makuhari in a secret room on the 8th floor of the library. This living arrangement had been made by the owner of the Toto Books store owner, and came to an end at the end of the 16th episode when Joseph Carpenter and the Special Operations Division bought the National Diet Library and confronted Yomiko. After a brief fight with some soldiers that were with Joseph Carpenter in the library, the 6 of them escape and head for Jinbocho.