1.
the reason is; that is because
used to introduce an explanation or reason for something previously stated
Functions
1. Giving a reason, at the start of a sentence:
[Statement]. というのは、[reason]からだ。
- Often used at the start of a sentence to explain the previous statement
- Similar to なぜなら (because)
2. Defining or explaining a term:
「X」というのは Y のことだ/である
- Used to explain what a word or phrase means
- Common in explanations and lectures