Transliterated to English, “Thank you (very much)” is “Arigato gozaimasu”.
I first learned this phrase in Italy from a fellow backpacker named Roberto. Roberto was a Brazilian of Japanese descent. He had achieved mastery of Portuguese, English and Japanese. We were sitting beside one another on the floor of a overbooked and cramped overnight Trenitalia train bound for Milan from Rome. The cabin seats filled before either of us arrived. Neither of us could get any sleep, so we spent the night trading stories of our travels.
At the end of the trip, we traded contact info and promised one another we’d stay in touch. I have not seen Roberto since. When I find myself in Rome, I’ll give him a ring.