に伴って・
One development brings another with it. That can be a slow change, or a single event and what comes of it: a move, a new law, building work.
a slow change
As the population grows, demand for housing is rising too.
one event
With building work starting, the main entrance will be closed from next month.
How to form it
Noun + に伴って／に伴い
に伴い is the more document-like of the two. A verb comes before it both with の and without: 増えるのに伴って, 進むに伴い.
Before a noun
Noun + に伴う + noun
法改正に伴う変更, the changes that come with the new law.
- Before it
- A change or an event: 増加, 普及 (spread), 移転 (a move), 工事 (building work), 改正 (a change in the law).
- After it
- Another change, or what is being done because of it.
- Where you'll meet it
- Notices from companies, stations and city offices, business email, the news. In conversation people say ので or で: 工事で.
In use
Users were told in advance about the temporary shutdown that comes with the system update.
As the number of users grew, so did the enquiries to the support desk.
Because of an equipment inspection, the water supply will be off for one hour from 2 a.m.
It doesn't need gradual change
につれて and にしたがって need a change that takes time. に伴って also takes one event, where English says "with" or "due to".
Not said: 引っ越しに
(With my move, my address has changed.)
A move is one event: 引っ越しに伴い、住所が変わりました.
The four words for "as … changes"
につれてN3
Both sides change little by little. Neutral: people say it as well as write it.
As I've gotten older, staying up all night has become harder.
とともにN3
The same as につれて, in a stiffer voice. After a person it is "together with".
As the population ages, social security costs are rising too.
にしたがってN2
Also the same as につれて, a little formal: reports and explanations. It alone can mean "following" an instruction or a rule (指示にしたがって).
As you go farther north, the temperature drops.
に伴ってN2This page
One development brings another with it. It can be a single event and what comes of it, so nothing has to be gradual. The most formal of the four.
With the move of our head office, we are changing our address and telephone number.
Check yourself
1A notice at a bus stop. Which one fits?
新駅の
Choose an answer to see why.
2Which one fits?
今回の
Choose an answer to see why.
More detail
With を, 伴う is "come with" or "involve": 危険を伴う仕事.
Tomorrow there will be heavy rain with thunder.
More sentences
As technology advanced, products became smaller and smaller.
As the organization grew, its management structure had to be reviewed.
We have put together the changes to the application procedure that come with the revised law.
As online transactions become more common, confirming people's identity matters more and more.