Usage of では in this sentence


I have read some topics about usage of では on the internet, like で for places,
means, tools and は to mark the subject, argument,... However, I can't apply
those to explain meaning of では in this sentence

> 今回の値上げは、原発事故の影響で、火力発展の燃料費が増加したことによるものだと東京電力 **では** 説明しています

As I understand, 東京電力 is Tokyo electric company and they are the one (the
subject) explaining the reason why electric price is going up. Why do the
writer add not only は but also で here?




は does not mark the subject; it marks the _topic_. The topic can serve any
other function in the sentence. Often the _topic_ is the _subject_. But, it
can also be the _object_ (direct/indirect) of the verb. は also can be used to
mark contrast.

Notice, the topic is actually 値上げ, the increase in price.

With 東京電力では, the use of は adds a sense of contrast. Various other electric
companies might explain the increase in prices in other ways but here _at
Tokyo Electric_ the explanation is that which was quoted.




は does not mark the subject; it marks the _topic_. The topic can serve any
other function in the sentence. Often the _topic_ is the _subject_. But, it
can also be the _object_ (direct/indirect) of the verb. は also can be used to
mark contrast.

Notice, the topic is actually 値上げ, the increase in price.

With 東京電力では, the use of は adds a sense of contrast. Various other electric
companies might explain the increase in prices in other ways but here _at
Tokyo Electric_ the explanation is that which was quoted.

