This means 'according to' something. It shows where information comes from. It can also mean 'in' a certain situation.
Noun + ではPrimary
This means 'according to' something. It shows where information comes from. It can also mean 'in' a certain situation.
天気予報では、明日は晴れるそうです。
According to the weather forecast, it will be sunny tomorrow.
その説は、最新の研究では正しくないとされている。
In the latest research, that theory is considered to be incorrect.
昨日のニュースでは、新しい法律が可決されたと報じられていた。
Yesterday's news reported that a new law was passed.
先日の会議では、来年度の予算について話し合いました。
In the recent meeting, we discussed next fiscal year's budget.
母からの手紙では、祖母は元気だとのことです。
In the letter from my mother, it says that my grandmother is doing well.
This grammar shows where information comes from. It also shows the situation your sentence is about. Think of it like a spotlight. It shines on the part of the world you are talking about.
This is different from 「〜によると」. 「〜によると」 means 'according to'. It is for who said something. 「〜では」 is for where you heard it. For example, 'in the news'. You cannot use 「〜では」 for a person. You must say 'in Tanaka's story'.
Don't use this when you talk about a person. For people, use "〜によると." For example, you cannot say "田中さんでは." You must say "田中さんによると."
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