Ima wa mukashi no ima nari ya - Katō, Hidetoshi (Takeuchi Shoten Shinsha, 1984)
Subtitle on colophon: Taishō ga yosoku-shita 100-nengo.
Keywords: Twentieth century / Forecasts. / http://id.loc.gov/authorities/subjects/sh85139021; Social prediction. / http://id.loc.gov/authorities/subjects/sh85123986; Forecasting. / http://id.loc.gov/authorities/subjects/sh85050485