How to say “length” in Japanese | 長さ (ながさ、nagasa)

The Japanese vocabulary「長さ (ながさ、nagasa)」means “length.” Please learn the pronunciation and the example sentences.

Japanese Vocabulary and the Meaning

Key Word長さ
Hiraganaながさ
Romaji Readingnagasa
English Meaninglength

The Correct Japanese Pronunciations

Please learn the pronunciation by watching the attached video. You can also learn example sentences.

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The Example Japanese Sentences

It is important to have skills in both non-honorific and honorific languages in order to use Japanese correctly.

I’ll measure the length of my palm.

Plain Form:

のひらのながさをはかる。
Tenohira no nagasa o hakaru.

Polite Form:

手のひらの長さを測ります。
Tenohira no nagasa o hakarimasu.


The extension cord is short.

Plain Form:

延長えんちょうコードのながさがみじかい。
Enchō kōdo no nagasa ga mijikai.

Polite Form:

延長コードの長さが短いです。
Enchō kōdo no nagasa ga mijikaidesu.


The length of this river is approximately 10km.

Plain Form:

このかわながさは、およそ10kmだ。
Kono kawa no nagasa wa, oyoso jukkiro-mētoru da.

Polite Form:

この川の長さは、およそ10kmです。
Kono kawa no nagasa wa, oyoso jukkiro-mētoru desu.


This rope is 10m long.

Plain Form:

このロープのながさは10mある。
Kono rōpu no nagasa wa jū-mētoru aru.

Polite Form:

このロープの長さは10mあります。
Kono rōpu no nagasa wa jū-mētoru arimasu.


I measured the length of the garden fence.

Plain Form:

にわのフェンスのながさを測定そくていした。
Niwa no fensu no nagasa o sokutei shita.

Polite Form:

庭のフェンスの長さを測定しました。
Niwa no fensu no nagasa o sokutei shimashita.


I adjusted the length of the string and re-tied my shoelaces.

Plain Form:

ひもながさを調整ちょうせつしてくつひもをむすなおした。
Himo no nagasa o chōsei shite kutsu himo o musubi naoshita.

Polite Form:

紐の長さを調整して靴ひもを結び直しました。
Himo no nagasa o chōsei shite kutsu himo o musubi naoshimashita.


I carefully checked the length of the building’s exterior walls on the blueprint.

Plain Form:

建物たてもの外壁がいへきながさを図面ずめんでしっかり確認かくにんした。
Tatemono no gaiheki no nagasa o zumen de shikkari kakunin shita.

Polite Form:

建物の外壁の長さを図面でしっかり確認しました。
Tatemono no gaiheki no nagasa o zumen de shikkari kakunin shimashita.

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Units of Measurement