Koua sangyou taikan

Koua sangyou no zenbou : mohan sangyou taikan

Koua taikan

Koua sangyou taikan : kouki 2600nen kinen

Koua sangyou shinkou tenrankai soukan

Oosaka mohan sangyou taikan

Kansai mohan sangyou taikan

Koua no taigyou

Koua no taigyou

Koua no taigyou

Teikoku sangyou taikan

Gifuken shoukou sangyou jinmei taikan

Hakodate sangyou taikan

Kyuushuu sangyou taikan

Koua no taigi

Koua ichiro

Koua ichiro

Koua nihon no jigyouka

Koua nihon no jigyouka

Koua nihon no jigyouka

Koua seigyou zaikaijin fu

Koua keizairon

Koua keizairon

Koua kouenshuu

Koua kouenshuu