Rio Olympics 2016

At the closing ceremony, as the torch was being passed from Brazil to Japan, did you notice the floor of the venue covered with the word(s) "Thank You" in many languages?  Brazil's thank you was at the center, and Japan's was right under Brazil's.  It looked like this:

                                                               OBRIGADO
                                                               ORIGATO

Did you catch the similarity?  When the Portuguese explorers arrived on the shores of Japan, and were saying "obrigado" for "thank you," the Japanese adopted that as "origato."