antenna tower

The area south of Nagoya Castle is the government sector of the city, with large, boxy, conservative Modernist buildings (with the exception of Nagoya City Hall and the Aichi Prefectural Building, which are both historic, idiosyncratic and highly eclectic). 

Many of the government buildings here have large antenna towers perched on top... I`m not sure why, but my guess is that in an emergency (like a major earthquake), it`s to ensure that lines of communication remain open and accessible.

The tower with the triangular top in the distance in this sketch is the Higashiyama Sky Tower, which is located by the Higashiyama zoo, east of the city core.