Translation guide
The English phrase "inner part" refers to the inside or interior of something. In Japanese, this concept is expressed through several words and patterns depending on what kind of "inside" is meant—physical interior, abstract inner self, or the deeper part of a space or object.
Referring to the inside of a physical thing, such as a room, container, or body part.
General term for the inside or interior of something, often used for machines, buildings, or organizations.
The inner part of the building is very spacious.
Clean the inner part of the machine.
Emphasizes the inner side or surface, often contrasted with the outside. Common for clothing, containers, and physical layers.
Please write your name on the inner part of the box.
The inner part of the coat is made of warm material.
Everyday word for 'inside'. Very common but can be vague; often used with location particles.
What is in the inner part of the box?
Referring to the inside of a living body, such as organs or deep tissues.
Referring to one's inner thoughts, feelings, or true nature.
Refers to one's inner self, personality, or psychological interior.
He looks gentle on the outside, but his inner part is strong.
Literally 'the depths of the heart', used for deep-seated feelings or true intentions.
In the inner part of my heart, I believed in him.
Referring to the innermost area of a room, forest, or other space, often far from the entrance.
Indicates the back or far inner part of a space. Very common for rooms, buildings, and natural areas.
Let's sit in the inner part of the shop.
There is a lake in the inner part of the forest.
Literally 'deepest part', used for caves, oceans, or metaphorical depths. Technical or literary.
内部 (ないぶ) is formal and often used for mechanical, structural, or organizational interiors. 内側 (うちがわ) focuses on the inner side or surface, often in contrast with the outside. 中 (なか) is the most general and colloquial, but can be too vague for precise descriptions.
English often uses 'inner part' as a phrase, but Japanese rarely uses a direct equivalent like 内側の部分. Instead, choose the specific noun that fits the context.
The inner part of my throat hurts.
洞窟の最深部には誰も行ったことがない。
No one has ever gone to the innermost part of the cave.