Honestly, I'm not a big fan of the real dish, but they taste good at home with various ingredients.

There aren't necessarily rules for entertaining over here, but there are customs that run deep. Most people here would never go to anyone's house without some kind of gift, usually fruit or cookies or some kind of snack, to excuse themselves for intruding. And since a gift is almost always returned in Japan, that means you send your guests home with something too. It can be a bit tedious, but it's worth it.