My research aims to elucidate the circumstances and significance of the reconstruction of castle towers in the period preceding the Second World War. This paper covers reconstructed castle towers built as temporary structures on the sites of early-modern castles in Kofu and Tsuyama. Both were built as privately funded projects for exhibitions at the castle sites to commemorate the opening of railway lines. Both exhibitions drew many visitors and the towers were illuminated at night. Intended as temporary structures, the reconstructed towers were popular and spurred requests from local citizens that they would remain in use after the exhibitions ended.