Japanese coin need help ID

This seems to be a 1972 commemorative piece for the Urado bridge in Kochi, Japan. But I can't seem to find a single picture or mention of this coin online.

Help would be deeply appreciated to know more about this coin.

Thanks

It's a medal not a coin.

Thanks for the info, didn't know if it was a token or a medal. 

Couldn't find the same item in a Japanese search either just half a dozen other designs.

You might need to search through some Yahoo auctions or be contempt with the fact that you will not find out more then what is written and depicted on it.

Thanks for the research, I wasn't able to find anything on Yahoo auction either… I do believe I will never know more about this medal. 

Thanks for your help :)