Anyone fluent in Japanese?

Last autumn we ended up, by accident more than by choice, in Kushiro. At dinner we went to one of those classic restaurants with booths and grills, a bit like an izakaya, of the kind you can find under a train station in Tokyo. We ordered random food, had a great evening, and when it came to leave the whole staff (and a few of the other customers) saluted us (to the point that they were waving out of the windows) and gave as a present these two bananas with something written on it. Google Translate is having a very hard time coming up with a translation, but it feels as if it's some sort of encouragement. If anyone could translate it for me that'd be great! Thanks.