Librarians
Books from the special collections were marked as "toku" ("special") next to their call number in the catalogue. Many of such books were lavishly published volumes with reproductions, such as the Shinbi taikan (Selected Relics of Japanese Art), Nihon kokuhō zenshū (National Treasures of Japan), or the annual catalogues of the official salon in Tokyo. To view these books, a patron needed to obtain a special permission from the library's director and provide a justification (Taiwan sotokufu toshokan gairan, showa 13/1938 page 12). Presumably, librarians could help their patrons in obtaining this special permission.