The only foreign country that Kei has been to apart from Spain is the UK. You can buy the vast majority of Japanese staple foods from any decent supermarket in the UK, and the food isn’t that different. Kei found the food to be very different in Spain, and had some problems having a totally non-Japanese diet for the whole week (and yet, there are several things she first had in Spain that she really likes now, so in the end it wasn’t nearly all bad)