pre-noun adjectival
Used before nouns to emphasize the genuine or actual nature of something, often contrasting with appearance or pretense.
He didn't tell the real story.
pre-noun adjectival
blood-related; biological (parent, sibling, etc.)
Specifies a biological family relationship, as opposed to step- or adoptive relations. Common with 父, 母, 兄, 姉, 弟, 妹, 子.
He is not my biological father.
Actually, I haven't decided yet.
実の兄弟のように育った。
We grew up like real brothers.