The building is owned by the Kasumi Kaikan (霞会館), an association of the former kazoku high nobility.

[5] The plot was once owned by the Kazoku Kaikan (華族会館), the previous association, which was changed after World War II in 1947.

[7] The Asian Development Bank Institute has its head office on the 8th floor of the Kasumigaseki Building.

[13] Two airlines, Garuda Indonesia and Union des Transports Aériens, at one time had offices in the building.

[4] The building was often used for comparison to things with large volumes in Japan which continued until the construction of the Tokyo Dome, a huge indoor stadium.