Counting Family Members:ー家族、ー兄弟
Counting family members in Japanese is sometimes very confusing. Suppose that you have the following sibilings:
Your answer should be:「三人兄弟です。」(you include yourself in counting)
But when someone asks you:「ご兄弟は、何人いますか。」
Your answer should be:「二人います。」(you exclude yourself in counting)
Suppose that you have the following members in your family:
「ご家族は、何人いますか。」(here, usually, you list your family members by saying:
--->「父と母と姉と弟がいます。」