〜に伴って: As / Along With (Two Changes Happening Together)
When one change brings another along with it
に伴って says that as one thing changes or progresses, a second thing changes right along with it — the two are treated as bound together, not coincidental.
高齢化に伴って、医療費が増加している。
こうれいかに ともなって、いりょうひが ぞうかしている。
Along with the aging population, medical costs are increasing.
One ongoing change (aging) brings another (rising costs) with it.
引っ越しに伴って、住所変更の手続きをしてください。
ひっこしに ともなって、じゅうしょへんこうの てつづきを してください。
In connection with the move, please complete the address-change procedure.
Here 伴って marks something incidental to an event, not just gradual change.
Noun/verb + に伴って
| Attaches to | Pattern | Example |
|---|---|---|
| Noun | Nに伴って | 人口の増加に伴って |
| Verb (dictionary form, a change verb) | Vに伴って | 気温が上がるに伴って |
技術の進歩に伴って、生活は便利になった。
ぎじゅつの しんぽに ともなって、せいかつは べんりに なった。
Along with the advance of technology, life has become more convenient.
やったんが有名になるに伴って、モチも忙しくなった。
やったんが ゆうめいに なるに ともなって、モチも いそがしく なった。
As Yattan became famous, Mochi got busier too.
に伴って vs. につれて vs. と共に
につれて overlaps heavily with に伴って for gradual, parallel processes (年を取るにつれて／に伴って、体力が落ちる), but に伴って can additionally mark something merely incidental to an event — paperwork that "accompanies" a move — without any gradual process at all. と共に ("together with") is broader still and can link two simultaneous facts that aren't cause-and-effect at all.
The short version
- 〜に伴って = "as/along with [a change], [another change/event] happens too"
- Attaches to: a noun, or the plain form of a change verb
- Nuance/register: formal/written; frames the second event as accompanying the first, not coincidental
- Don't confuse with: につれて (gradual parallel change only) or と共に (broader "together with")
Practice it
Pick に伴って where one change is described as bringing another along with it.
＿＿＿に入れるのに最もよいものを選びなさい。
＿＿＿、医療費が増加している。
Where 〜に伴って fits
Shaky on this? Get these solid first
- 〜てください · N5 — 〜てください is the standard way to politely ask someone to do something ('please do…'). Learn the formation, the negative 〜ないでください, softer variations, and see clear examples.
More N2 grammar to explore
Keep going with related patterns at the same level:
- 〜につけ — 〜につけ attaches to the dictionary form of a verb, often paired as AにつけBにつけ, and means 'whenever/every time X happens, the same feeling or thought follows.' It usually precedes a verb of remembering, noticing, or feeling.
- 〜につれて — につれて links two changes that happen together: as one thing progresses, the other progresses along with it (収入が増すにつれて物欲も大きくなる). It marks a gradual, parallel change, not a single cause-and-effect moment.
- 〜にて — にて is the formal, written equivalent of で, marking location, time, or means (パーティーの席上にて、コミックマーケットにて). It's used in announcements, formal writing, and set classical phrases like 〜にあらず.
- 〜にわたって — 〜にわたって attaches to a range of time, distance, or scope to mean 'throughout' or 'spanning' — 広い地域にわたって (throughout a wide area). It emphasizes that something continued or extended across the entire range, not just a point within it.
- 〜のももっともだ — 〜のももっともだ follows a reason to mean 'it's only natural' or 'no wonder' — 約束を破られたのだから、怒るのももっともだ (given the broken promise, it's only natural to be angry). It expresses reasoned understanding, not just sympathy.
- 〜のもとで — 〜のもとで attaches to a noun to mean 'under', 'with', or 'in the environment/authority of' — 先生のもとで学ぶ (study under a teacher). It frames an influence, guidance, or condition that something happens within.