Saburō Ōkita

Shin sekai chitsujo to Nihon no yakuwari

Chikyū kankyō to seiji

Chikyū kibo no kankyō mondai

Chikyū kankyō to shimin

Chikyū no mirai o mamoru tame ni

Nanboku mondai

Nanboku mondai no shōrai tenbō to waga kuni no taiō ni kansuru kenkyū