looking for a 5 euro coin from the German Climate zones of the Earth series.

I am a Japanese coin collector. I would like to have a 5 euro coin from the German Climate zones of the Earth series. I have Japanese banknotes and coins. Is there anyone who can help me exchange them? I am using a translator, so there may be some mistakes in the text.

Ohayo gozaimasu,  

  I have a full set of 5 euro coin of climate zone from Germany. Can we open the swap? Furthermore, I am quite interested in Japanese silver coins. Actually, I have studied in Urasa (Niigata) during 2008 to 2010