～かというと is a phrase that has two primary functions. The first is used in conjunction with ‘why’ and ‘how’ words, while the other is used with ‘who’, ‘when’, ‘where’, and ‘what’. We will focus on the former in this lesson. かというと is a combination of the 格助詞（かくじょし） (case marking particle) か in its use as a question marker, the 格助詞（かくじょし）と
in its 引用（いんよう） ‘citation’ use, the う - Verb 言（い）う ‘to say’, and the 格助詞（かくじょし） と in its 結果（けっか） ‘result’ use.
This is quite a few particles combined together, but the literal meaning is more simply ‘if (A) were to be asked’, before the speaker will go on to highlight their reasoning in (B). どうして or なぜ.
The reason why I don't want to go to the party is because I heard that my ex-boyfriend is coming.
The reason why we have decided to continue with this plan is because a similar plan succeeded last time.
As ～かというと will come before some sort of explanation, から will also regularly be used at the end of the sentence as ‘because’, emphasizing the speaker's reasoning.
Like other grammar points that utilize the ‘if’ nuance of と
, and sometimes even たら
may be used. However, たら
will appear far less frequently than と or ば
If you ask me why we keep the air conditioning on even in the winter, it is because we want the customers to shop without sweating.
If you ask me why I picked the cheaper one, it is because both the cheaper one and the expensive one have the same functionality.