～についてですが

Regarding...   ...についてですが

regard ﾘガｧ-ﾄﾞ v)注視する n)注視　Email返信のRE:
Regarding the breakdown of products...　商品の内訳ですが...

About....

Concernig...

As for...

-wise...

In regard to...
With regard to...
As regards ...
Concerning...
In relation to...
In terms of...

日常会話　About.../Speaking of.../As for.../By the way
直接的に　Sorry to interrupt, but I ...　To change the subject,...