なぜなら

conjunction

because, the reason is

1. because, the reason is that

Used to introduce an explanation or reason for something stated before.

He didn't come. The reason is that he was sick.

Often followed by 〜からだ

Because I don't have time.

I succeeded, because I kept making an effort.

I'm against that plan. The reason is that it costs too much.

I think she is a trustworthy person. The reason is that she always keeps her promises and helps people in need.

USAGE:
なぜなら typically starts a new sentence or clause and is followed by the reason, often ending with からだ/からです.

PATTERN:
[Statement]. なぜなら〜からだ/からです。

SIMILAR EXPRESSIONS:

NOTE:
なぜなら is more common in written Japanese and formal speech. In casual conversation, だって or simply 〜から is more common.

core

Added 2026.1.12 21:48 · Revised 2026.5.28 0:51

03500/03766_nazenara