内 側(うちがわ)

うちがわ

noun

inside; inner side

1. inside; inner side; interior

The part that is within or facing inward.

ドアの内側(うちがわ)に鍵(かぎ)がある。

There is a lock on the inside of the door.

箱(はこ)の内側(うちがわ)を確認(かくにん)してください。

Please check the inside of the box.

カーブでは内側(うちがわ)を走(はし)ると早(はや)い。

Running on the inside of a curve is faster.

内側(うちがわ) refers to the inside, inner surface, or interior of something—the part that faces inward.

Common expressions

内側(うちがわ)から開(あ)ける: to open from the inside
内側(うちがわ)に向(む)く: to face inward
内側(うちがわ)を見(み)る: to look at the inside
内側(うちがわ)に入(はい)る: to go inside

Similar words

内側(うちがわ): inside, inner side
外側(そとがわ): outside, outer side
中(なか): inside, within (more general)
内部(ないぶ): interior (more formal/technical)
裏(うら): back side, reverse side

Usage

内側(うちがわ) specifically emphasizes the side or surface facing inward, rather than the space within. Use 中(なか) for referring to the space inside something.

Related Words

Antonym: 外側(そとがわ) (outside, outer side)

Synonym: 内部(ないぶ) (interior (formal))

Compare: 中(なか) (inside, within)

Compare: 裏(うら) (back side, reverse side)

general

Added 2026.1.16 16:37 · Revised 2026.9.4 21:29

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