|Miyazaki's Big Animated Clock at NTV / Tostzilla|
The enormous copper clock is 12 metres high, 18 metres wide, and has extensive animations timed to music including firing steam cannon, moving figures, and moving legs like Howl's Moving Castle. In fact, the whole contraption reminds me of Howl's Moving Castle. The clock was built by sculptor Shachimaru Kunio who also built the giant Laputa robot on the rooftop of the Ghibli museum. Miyazaki said that he wanted to make something that would be loved by future generations that would last beyond his animated characters. Try to be there on the hour, but the animations don't always run every hour.
The site below has many close up pictures of the clock for your viewing pleasure.
NTV Site about their "Large Clock" Flash or Google Chrome is required. It is in Japanese.
Apparently, the clock animations may not be running while there are power saving measures in place, so the possibility you may not see the mechanical sequences does exist. Other than this clock there are many things to see in the Shiodome area and I have covered them in this post here.