Question: Tachu Naito was the father of earthquake-proof design, and built many broadcasting and observation towers, including what communications and observation tower in the Shiba-koen district of Minato, Tokyo, Japan?

<P0-S0> The Tower of Unity (German: Turm der Einheit) is a 30 meter high observation tower on Heldrastein, a rocky mountain belonging to Treffurt in Thuringia. <P0-S1>  The tower of Unity has an unusual history and is also from unusual design, because it is additionally guyed by anchoring wires, although it is actually free standing. <P0-S2>  The tower of Unity was built in 1962 as transmitting tower for a radar station. <P0-S3>  At that time it was an open steel lattice tower additionally guyed with the radar facility on its top. <P0-S4>  The area of this tower was not accessible for tourists at those days as it laid in the restricted area of the former border between West and East Germany. <P0-S5>  In 1989, when the border was opened, the area became again accessible for the public and the desire developed to build on Heldrastein again an observation tower, as there was until 1952 an observation tower built of stones, the such called Carl Alexander tower there. <P0-S6>  In 1996 finally permission for the transformation of the radar tower into an observation tower could be received. <P0-S7>  In order to do this changes, which cost 205,000 DM, the radome on the top was removed and the tower body was covered with wood. <P0-S8>  In addition the tower got a stairway with 166 steps and an octagonal shelter at the tower basement. <SEP> <P1-S0> Tachū Naitō (内藤 多仲 , "Naitō Tachū" , 12 June 1886 - 25 August 1970) was a Japanese architect, engineer, and professor from Yamanashi Prefecture, Minami-Alps, Yamanashi. <P1-S1>  He was a father of earthquake-proof design and built many broadcasting and observation towers, including the Tokyo Tower. <SEP> <P2-S0> A Bismarck tower (German: "Bismarckturm" ) is a specific type of monument built according to a more or less standard model across the Germany to honour its first chancellor, Otto von Bismarck (d. 1898). <P2-S1>  A total of 234 of these towers were inventoried by Kloss and Seele in 2007 but more have been discovered since making the total around 240. <P2-S2>  These towers were built between 1869 and 1934 and some 173 remain today. <P2-S3>  Quite a few of these towers, including all 47 based on Wilhelm Kreis's "Götterdämmerung" design, were built as so-called Bismarck Columns ("Bismarcksäulen") or were converted into them. <P2-S4>  This description goes back to the Student Union's competition held in 1899, which was to encourage the erection of as many beacons as possible (and not observation towers). <P2-S5>  But other Bismarck towers, e. g. those which were purely beacons with no observation function, were often called Bismarck columns. <SEP> <P3-S0> Tokyo Tower (東京タワー , Tōkyō tawā ) is a communications and observation tower in the Shiba-koen district of Minato, Tokyo, Japan. <P3-S1>  At 332.9 m , it is the second-tallest structure in Japan. <P3-S2>  The structure is an Eiffel Tower-inspired lattice tower that is painted white and international orange to comply with air safety regulations.