Explore Words Kanji Grammar Guides

Copyright © 2026 Kotomora. All Rights Reserved.

Get the Kotomora apps for iOS and Android.

Explore Words Kanji Grammar Guides About Support Privacy

Copyright © 2026 Kotomora. All Rights Reserved.

重さ (おもさ) Japanese meaning | Kotomora

重おもさ

お

も

さ

Common word›JLPTN1›

Meanings

1

Refers to the physical weight of an object. Often contrasted with 軽さ (lightness).

See also: 軽さ

この荷に物もつの重おもさはどれくらいですか。
How much does this luggage weigh?

重おもさを量はかってください。

Please weigh it.

Usage patterns

〈物もの〉の重おもさを測はかるto measure the weight of something
この荷に物もつの重おもさを測はかってください。
Please measure the weight of this luggage.
重おもさが〈数かず〉あるto weigh a certain amount
このスイカは重おもさが五ごキロある。
This watermelon weighs five kilograms.
〈物もの〉の重おもさに耐たえるto withstand the weight of something
この橋はしは大おお型がたトラックの重おもさに耐たえられる。
This bridge can withstand the weight of large trucks.
重おもさを感かんじるto feel the weight (of something), literally or figuratively
リュックを背せ負おって、初はじめてその重おもさを感かんじた。
Once I put on the backpack, I felt its weight for the first time.

Kanji

重heavy, important, esteem

Related words

重じゅう量りょうN2
重量 is a more formal, technical term for weight often used in shipping, engineering, or legal contexts, while 重さ is the everyday word.
体たい重じゅうN4
重さ is a general term for the weight of any object, while 体重 refers specifically to a person's or animal's body weight.
ウェイト
重さ is the everyday native Japanese word for physical weight, while ウェイト is a loanword often used in fitness or technical contexts.
目め方かたN1
重さ is the common, general word for weight, while 目方 is a slightly old-fashioned term used mainly when physically weighing objects.
重おもみN2
重さ is the objective, measurable weight of an object (e.g., 5kg), while 重み often implies a subjective or perceived heaviness, physical or abstract.

Opposites

軽かるさ
軽さ means 'lightness', the direct opposite of 重さ ('weight/heaviness').

Don't confuse with

重おもみN2
重み can refer to physical heaviness like 重さ, but it more often carries a figurative sense of 'weightiness' or 'importance' (e.g. 言葉の重み), while 重さ stays literal.
質しつ量りょうN1
重さ (weight) depends on gravity and changes with location, while 質量 (mass) is an intrinsic, unchanging property of matter.
重おもき
重さ refers to the physical weight of an object, while 重き refers only to figurative importance or emphasis, as in 重きを置く.

Etymology

Derived from the adjective 重い (heavy) with the nominalizing suffix さ, forming a noun meaning 'weight'.