1 Best Sight in Tokyo, Japan

National Diet Building

Chiyoda-ku

The Japanese parliament occupies a perfect example of post–World War II Japanese architecture; on a gloomy day it seems as if it might have sprung from the screen of a German Expressionist movie. Started in 1920, construction took 17 years to complete. Guided tours are available most days, but it's best to call ahead to confirm times. The prime minister's residence, Kantei, is across the street; you can try and get a glimpse of it, but it's quite hidden by walls and trees.

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