The university had set up the "Kobayashi Kakuhitsu Reference Room" in the basement of the Central Library at Hiroshima University. It is the first reference room in the world to store a collection of the Kakuhitsu documents.

Professor Emeritus Yoshinori Kobayashi, a leading researcher of the Kakuhitsu and a recipient of the Person of Cultural Merit honor, donated 293 pieces and 943 volumes of Kakuhitsu documents to the university, which led to the establishment of the reference room.

Kakuhitsu is a sharp-pointed writing implement made of wood or bamboo. In 1961, Professor Emeritus Kobayashi discovered the first Kakuhitsu inscription (indented characters and drawings made with the Kakuhitsu) in Chinese classics. Since then, these unique writings have been found in ancient documents from various parts of Japan, China, and Korea, and the number of documents found in Japan has reached 3,350.

Also, the reference room possesses the "Kakuhitsu-scope," which was designed to make the dented letters and symbols written with the Kakuhitsu brush in ancient archives more visible.

The aim for the future will be to make the collection widely available to researchers around the world to allow the continuous development of the research into the Kakuhitsu writing tool, which Professor Emeritus Kobayashi pioneered.