1891
Yamada, Naoyoshi
Shinsen Okayama-shi meisaizu
Pocket Map
1900
Kitamura, Chotaro
Shuchin Okayama-shi shinchiz
1906
Chiri Kenkyukai
Saishin Okayama shigai chizu
1912
Maruyama, Jintaro
Okayama Korakuen zu.