China sponsored Marco Polo's exploration.
Italian Trader
He didn't represent any country. Polo was a 17 year old young man who left Italy with his father a Venice merchant to establish trade with China. It took them 4 years to reach it.
*
Italy
Marco Polo had never been to Japan, but he did write about what he heard about the country while he was in China. Marco Polo called Japan Cipangu, which means 'the country of Japan' in Chinese.
Italy
Marco did not sail for a country
Spain :)
china
Italy
vinice