piezoelectric examples in Japan (Goshiki-Zakura bridge )

This is a Goshiki-Zakura bridge which is in Japan.

It's extraordinary.

Because the light of the bridge could be turned on by the vibration on the bridge. 

you could see this video. (especially 1:10)

I saw a Japanese article.
They said this is one of the projects which Japan do it.
It could generate 0.24Wh for one day.

This is not commercialized product.
Only an experimental thing.


(This is the Japanese article: http://ascii.jp/elem/000/000/112/112146/)

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