Books by Yasunori Koyama
Sengokuki Kinai no seiji shaka
Sengokuki Kinai no seiji shakai kōzō
Wakayama-ken no rekishi
Wakayama-ken no rekishi
Nanki to Kumano kodō
Nanki to Kumano kodō
Chūsei jisha to shōensei
Rekishi no naka no Izumi
Rekishi no naka no Izumi
Shōen ni ikiru hitobito
Shōen ni ikiru hitobito
Ezu ni miru shōen no sekai