密度
Density refers to the degree to which something is compact or crowded. It can describe physical mass per volume, the concentration of people in an area, or the richness and intensity of time and content.
例文
3 / 5このパンは密度が高くて、おいしいです。
This bread is dense and delicious.
都市部では人口密度が急激に上昇しています。
Population density is rising rapidly in urban areas.
今日の予定、密度がすごすぎるよ。
Today's schedule is way too packed.
語族
覚え方のコツ
Visualize the kanji: 密 (Mitsu) means 'tight' or 'secret' and 度 (Do) means 'degree'. It is the 'degree of tightness'.
クイックテスト
東京は世界的に見ても人口＿＿＿が高い都市です。
正解！
正解は： 密度
例文
このパンは密度が高くて、おいしいです。
everydayThis bread is dense and delicious.
都市部では人口密度が急激に上昇しています。
formalPopulation density is rising rapidly in urban areas.
今日の予定、密度がすごすぎるよ。
informalToday's schedule is way too packed.
実験で水の密度を正確に測定した。
academicWe accurately measured the density of water in the experiment.
業務の密度を上げ、効率化を図ります。
businessWe will increase the intensity of our work to improve efficiency.
語族
よく使う組み合わせ
よく使うフレーズ
密度の高い時間
high-quality/productive time
情報密度
information density
骨密度
bone density
よく混同される語
Noudo (concentration) is used for liquids or mixtures, while Mitsudo (density) is for mass/volume or spatial distribution.
使い方のコツ
While primarily a scientific term, it is frequently used metaphorically to describe how 'full' or 'rich' a period of time or a piece of work is.
よくある間違い
Learners sometimes use 'atsui' (thick) when they should use 'mitsudo ga takai' to describe the denseness of a forest or a cake.
覚え方のコツ
Visualize the kanji: 密 (Mitsu) means 'tight' or 'secret' and 度 (Do) means 'degree'. It is the 'degree of tightness'.
語源
A Sino-Japanese compound (Kango) combining 'dense/close' (密) and 'degree/measure' (度).
文法パターン
文化的な背景
Given Japan's limited habitable land, 'population density' (jinkou mitsudo) is a very common topic in news and social studies.
クイックテスト
東京は世界的に見ても人口＿＿＿が高い都市です。
正解！
正解は： 密度
関連語彙
関連単語
粒子
A1A very small piece or bit of matter, such as a grain of sand, a speck of dust, or a microscopic unit like an atom or molecule. It is commonly used in scientific contexts to describe the fundamental components of a substance or in photography to describe the grain of an image.
電子
A1Refers to an electron in a scientific context or, more commonly, signifies that something is digital or electronic. It is frequently used as a prefix to describe modern technology replacements for traditional items like books or money.
中性子
A1A neutron is a subatomic particle found in the nucleus of an atom that carries no electric charge. It has a mass slightly larger than that of a proton and is essential for the stability of atomic nuclei.
元素
A1A chemical element, which is a fundamental substance that cannot be broken down into simpler substances by chemical means. It refers to the basic building blocks of matter listed on the periodic table.
化合物
A1A substance formed when two or more chemical elements are chemically bonded together. It is used primarily in scientific contexts to describe materials with a fixed ratio of components.
混合物
A1A substance made by combining two or more different materials without a chemical reaction occurring. It can be used in scientific contexts to describe chemical blends or in general contexts to describe a physical combination of items.
溶液
A1A liquid mixture in which a substance (solute) is uniformly dissolved in another substance (solvent). It is most commonly used in chemistry to describe liquids like salt water or chemical mixtures used in experiments.
溶媒
A1A substance, typically a liquid, in which another substance (the solute) is dissolved to form a solution. In a chemical context, it acts as the medium that facilitates the breaking down of particles.
溶質
A1A solute is a substance that is dissolved in another substance (called a solvent) to create a solution. In a mixture like salt water, the salt is the solute because it is the part that gets dissolved.
窒素
A1Nitrogen is a colorless, odorless chemical element that makes up about 78 percent of the Earth's atmosphere. It is essential for all living things and is widely used in fertilizers and industrial cooling as liquid nitrogen.
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