This means something covers a wide area. It can be about time, space, or many different topics.
Noun + にわたってPrimary
Noun + にわたる + Noun
This means something covers a wide area. It can be about time, space, or many different topics.
会議は３日間にわたって行われました。
The conference was held over a period of three days.
関東地方全域にわたる大規模な調査が実施された。
A large-scale investigation covering the entire Kanto region was conducted.
彼の研究は、文学から科学まで多岐にわたっている。
His research spans a wide range of fields, from literature to science.
長年にわたる交渉の末、両国はついに合意に達した。
After negotiations that spanned many years, the two countries finally reached an agreement.
その規制は、今後10年間にわたって国内産業に大きな影響を与えないだろう。
That regulation probably won't have a major impact on domestic industry over the next 10 years.
This grammar sounds very formal. It is for big things. Like a long time or a wide area. Do not use it for small things. It would sound too serious. Imagine saying 'I brushed my teeth for a whole minute'. It is like that.
This is different from "~wo tooshite" or "~wo tsuujite". Those mean something happens all the time during a period. This is also different from "~kara ~ni kakete". That phrase can be less exact about the start and end. "~ni watatte" means the whole thing, from beginning to end.
Don't use this when talking about a single point. For example, you cannot say "at 3 o'clock" or "at Tokyo Station" with this grammar.
Contrasts with(3)
More formal alternatives(2)
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