Books by Oka, Masao
Tenkanki no ginko keiei
Tenkanki no ginko keiei
Saikenkoku Nihon no yakuwari
Kinyu gurobaru-ka to ginko kei
Kinyu gurobaru-ka to ginko keiei
Kaigun Yokaren yomoyama monoga
Kaigun Yokaren yomoyama monogatari
En ga kijiku tsuka ni naru hi
En ga kijiku tsuka ni naru hi
Okayama no Uchida Hyakken (Oka
Okayama no Uchida Hyakken (Okayama bunko)