というのは
(Toiu no wa)
what is called / the fact is / the reason is.
Connection rules
- ＋Noun + というのは; plain-form clause + というのは.
- ＋Definition / explanation marker — 'what X is' or 'the reason is'.
- ＋Very common in introductions and explanations.
Examples
1.
友情というのは、お金で買えないものだ。
Yuujou toiu no wa, okane de kae nai mono da.
Friendship is something you can't buy with money.
「what is called / the fact is / the reason is」
2.
遅れたというのは、電車が止まったからだ。
Okure ta toiu no wa, densha ga toma ta kara da.
The reason I was late is that the train stopped.
「what is called / the fact is / the reason is」
Practice
As for what "deja vu" is, it refers to the feeling that you have experienced something before.
___、一度も経験したことがないのに、すでに経験したことがあるように感じる現象のことだ。
Romaji also accepted