Culture

Hello.

Today's topic is difficult for me.
Japanese culture isn't strange for Japanese people.However,it may seem strange for foreign countries.For example,in business,Japanese people give gifts to others.It's strange for foreign people. for example, I heard from one of my friends about unusual cultural custom.In Australia, even if there are some customers in the shops, clerk start closing. It isn't usual thing in Japan.
And If i could pick one custom from another culture that would become part of Japanese culture,I'll pick Christianity.It's difficult topic.X( Actually,I don't know other culture.So, I didn't know what should I choose.Thank you for your reading.