Toyonokuni Libraries for Cultural Resources, Modern library in Ōita, Japan

Toyonokuni Libraries for Cultural Resources is a complex in Oji-Nishi-machi, Oita, designed by Oita-born architect Arata Isozaki. The prefectural library occupies the center, the Prefectural Archives of Historical Records the west side, and the Prefectural Public Records Archive the east side. The three facilities share one building and cooperate on reference services and document preservation.

The prefectural library opened in July 1966 in central Oita and also held archival records, though many expired documents were discarded. A 1990 basic plan led to a new building, constructed from October 1992 to September 1994. On 28 February 1995 the Toyonokuni Libraries for Cultural Resources opened, combining the library, the Senetsu Historical Archives and the Prefectural Archives, the first prefectural archives in Kyushu.

The facility brings together the prefectural library, historical archives, and regional archives all under one roof, serving as a place where visitors explore the stories and traditions that shape the region. People come here to connect with local heritage through documents, exhibitions, and research materials.

The location sits about 25 minutes on foot from JR Oita Station at 14-1 Oji-Nishi-Town and has parking available for visitors. Regular opening hours make it easy to plan a visit during standard operating times.

The three institutions share one building designed by Oita-born architect Arata Isozaki, with the library in the centre, the historical museum on the west side and the archives on the east. The archives opened as the first prefectural archives in Kyushu and the 25th in Japan.