～につれて 🚶 “As X changes, Y naturally follows” |
～に従って 📈 “As X progresses, Y follows it” |
～と共に 🤝 “Together with / at the same time as” |
～に伴って（にともなって）🔗 “As X changes, Y comes along with it” |
= X moves → Y naturally follows behind it. 🚶➡️ |
=X 📈 → Y follows X |
X 🤝 Y |
This is the one that deserves special attention. |
It emphasizes a gradual change. |
This is very similar to につれて, but there's a subtle difference. |
A broader grammar. They happen together. |
伴う（ともなう） = to accompany / go along with |
🧠 Memory につれて = “being taken along” |
従う（したがう） = to follow / obey |
共に（ともに） = together |
X changes → 🔗 Y comes with it |
X changes → Y gets taken along with X. |
The emphasis is on following a direction, progression, standard, or rule. |
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It's similar to につれて, but に伴って sounds more formal and often emphasizes consequences or changes that accompany a major event/change. |
例： |
年齢を重ねるにつれて、考え方も変わってきた。 As I get older, my way of thinking has also gradually changed. |
【年齢】ねんれいが上がるに従って、必要な【費用】ひようも増える。 As age increases, the necessary expenses also increase. |
【時代】じだいと共に、生活も変化してきた。 Along with the times, lifestyles have changed. |
【人口】じんこうの【増加】ぞうかに伴って、【交通問題】こうつうもんだいも【深刻】しんこくになった。 Along with the increase in population, traffic problems also became more serious. |
The age increases → thinking naturally changes along with it. |
Here, you're looking at a progression: age ↑ → expenses ↑ |
The focus isn't necessarily that one causes or pulls the other. |
The population increases → related consequences come along with that change. |
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It's simply: 時代 changes 🤝 生活 changes |
高齢化に伴って、介護サービスの【需要】じゅようが増えている。 Along with the aging of the population, demand for care services is increasing. |
日本語が上達するにつれて、会話が楽しくなった。 As my Japanese improved, conversations became more enjoyable. |
時間がたつに従って、気温が下がってきた。 As time passed, the temperature gradually fell. |
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This sounds very natural in news, reports, academic writing, business, etc. |
There isn't necessarily a rule saying this must happen. It's a natural progression. |
The temperature follows the progression of time. |
春が来ると共に、暖かくなってきた。 As spring came, it became warmer. |
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The two changes occur together. |
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🔥 につれて vs に従って |
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🔥 につれて vs と共に |
🔥 The really important distinction |
These can sometimes be interchangeable: |
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Compare: |
Look at these four: |
年齢を重ねるにつれて、体力が落ちる。 |
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年齢を重ねるにつれて、体力が落ちる。 |
🚶 につれて |
年齢を重ねるに従って、体力が落ちる。 |
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= As I age, my physical strength naturally declines. |
人口が増えるにつれて、住宅も増えていった。 As the population increased, housing also gradually increased. |
Both: |
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The relationship between the two changes is important. |
→ natural progression |
As you get older, physical strength declines. |
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vs. |
📈 に従って |
But the feeling differs slightly: |
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時代と共に、生活も変わった。 |
人口が増えるに従って、住宅の【需要】じゅようも【高まる】たかまった。 As the population increased, demand for housing rose accordingly. |
につれて → focuses on the natural accompanying change |
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= Along with the times, lifestyles changed. |
→ following the progression |
に従って → focuses more on the progression/trend |
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The idea is more: |
🤝 と共に |
Easy test: |
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The idea is more: |
【人口】じんこうの【増加】ぞうかと共に、【都市】としも【発展】はってんした。 Along with population growth, the city also developed. |
Ask yourself: |
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“These two things changed together over time.” |
→ two developments occurring together |
→ につれて |
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🧠 Memory |
🔗 に伴って |
“Am I picturing Y naturally being carried along?” |
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につれて = following |
人口の【増加】ぞうかに伴って、【交通問題】こうつうもんだいも【深刻化】しんこくかした。 Along with the population increase, traffic problems also became more serious. |
→ に従って |
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と共に = together |
→ a change/event brings associated consequences |
“Am I picturing Y following the progression of X?” |
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🧠 One-picture memory trick |
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Imagine population increasing: |
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につれて 🚶 |
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Population walks forward → housing follows |
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人口が増えるにつれて、住宅も増える。 |
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=Natural gradual change. |
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に従って 📈 |
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Population goes up → another thing follows the graph |
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人口が増えるに従って、需要も増える。 |
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Following a progression/trend. |
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と共に 🤝 |
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Population + city hold hands |
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人口の増加と共に、都市が発展する。 |
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=Together/simultaneously. |
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に伴って 🔗 |
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Population change has consequences attached to it |
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人口の増加に伴って、交通問題が起こる。 |
