(なかみ)

なかみ
noun
contents, interior
1. contents, inside
What is physically contained inside something.
中身(なかみ)(から)っぽだ。
It's empty inside.
(はこ)中身(なかみ)(なん)ですか。
What are the contents of the box?
Could you show me what's inside?
I took out all the contents of the bag and checked them.
I took out everything from the refrigerator, cleaned it, and then threw away the expired items.
2. substance, essence
The real quality or meaning of something.
The story lacks substance.
Substance is more important than appearance.
He looks good but has no substance.
I want to value substance, not just form.
People say you should judge others by their substance rather than appearance, but in practice it's not easy.

中身(なかみ) means contents (physical) or substance/essence (abstract). It refers to what's inside something.

PHYSICAL CONTENTS:

ABSTRACT SUBSTANCE:

SIMILAR WORDS:

DISTINCTION:
中身(なかみ) emphasizes the actual material/substance inside, while 内容(ないよう) is more abstract (content of a book, meeting, etc.).