Two Finns in Tokyo

I was visiting my japanese friend Masaki in Japan two years ago with another friend of mine (a Finn). We had met Masaki in Finland while he was studying here. In Japan we were staying at his parents place, where he as well was living. It is quite normal in crowded Tokyo that
people at almost their 30´s still live with their parents.
Masakis parents were extremely nice and hospital. They took us to see nice places, offered us lovely meals and even gave us some small presents. We tried our best to show how gratefull we are. They didn´t understand that much english but they knew words like "thank you" for
sure. We learnt some japanese words. We knew for example how to say that the food is delicious. Because of the lack of the words we tried to use more body language that we normally do in Finland. I was smiling all the time so much that my cheeks were hurting.It almost felt like faking.
After a week or so Masaki told us that he had had serious conversation with his parents. They wanted to know what is wrong with me and my friend. Why are we unhappy? Are we home sick? Masaki told us that he had tried to tell his parents even before we arrived about he´s
experiences about finns and how we differ from japanese. Still they were sure that we are not having good time at all and we are unhappy.
I'm still wondering what in our behaviour make them to missundertand us so totally.

Kaisa Kontio