Here are some of the manners I find different and am trying to show Amelia, even though they do not come naturally to me as they would a Japanese person.
Don't walk and eat
Greetings/Set expressionsIt's polite anywhere to greet people you meet. However Japan does have a rather large number of greetings, others are set expressions that should (read must) be used at certain times. Here are the ones that even small children are expected to master.
Good Morning/Hello/Good evening/ Good night
I'm going now/See you when you get back (Itte kimasu and Itte rashai)
I'm home/ Welcome home (Tadaima and Okaeri nasai)
I'm going to eat this now/ I just finished eating (Itadakimasu and gochisousama deshita.)
I was surprised that even a very young child can master a rather long phrase such as itadakimasu and gochisousama deshita. These phrases used to really trip me up when I was trying to learn Japanese back in NZ. These are just the day-to-day ones, not even the ones you would use in a work situation.
Take off shoes
Always carry a handkerchief
DH forgets his wallet and cellphone, but I've never seen him forget a handkerchief.
Gargling after coming in from outside(Maybe not so much manners but a national habit, nevertheless children are expected to do this)
Gargling is popular in Japan, especially in winter, supposedly to stop catching colds or the flu. Last year the government stated that there are actually no benefits to gargling with water but people continue to do it because I doubt everyone saw the news item I did and well, at least it feels refreshing. Amelia loves gargling and learnt how to do it by watching the kids on the educational channel doing it. They also show kids eating all their dinner, brushing their teeth and folding their clothes.
There must be loads more, any other mums and dads out there, please add your own "new to you" manner. Would love to hear about other countries, too.