It is Kachidoki-bridge built in 1929.
It was originally a movable bridge like Tower bridge in London, because this river was many passes of the ships. It has built-in motors and large gears, but now there are a lot of truck traffic, the motor is not used.
At first I took it from Tokyo tower (about 2km distance), but film on glasses of observatory is dirty, so I want to get closer, at last I took it from 2m :) . I found interest of wide angle lens!