The "Rasen-Tou (Spiral Tower)" is an unbuilt project, published in "Kenchiku Zasshi" by the Architectural Institute of Japan ("Kenchiku Gakkai") in 1902. The Tower was proposed by Kontarou Abe, was an associate member ("Tun-In") of this institute. We present an outline of the planning method of "Rasen-Tou (Spiral Tower)" and the career of Kontarou Abe, the proposer. The "Rasen-Tou", despite its unusual form, was planned in conformance with the principles of "Kiku-Jutsu", a traditional Japanese method of stereotomy based on wooden construction.
