だったから

because it was

→ だ

phrase Uncommon #12,277

because it was だった is the past form of だ (“to be”), and から means “because.” The phrase gives a reason or explanation.

JA: 昨日は休みだったから、家にいました。

EN: Because yesterday was my day off, I stayed home.

I always waited for Mei here after work because it was her favorite place.

— 恋する惑星 (1994)

I worked all day, so I’m exhausted.

People had little money and were careful about spending it, so they kept buying less and less.

Besides, I was the oldest orphan, so I had no one my own age or older to talk to.

Because I was a newspaper reporter.

Since I had a car, I took the ferry.

Yesterday was Sunday, so I spent the whole day sleeping.

Because that was his habit.

— 落下の解剖学 (2023)

They said it all happened so suddenly that they couldn’t say goodbye.

— Love Letter (1995)

Because that was the plan.

— ブレードランナー 2049 (2017)

I had pizza for lunch, so I'd like something other than pizza for dinner.

I hurried not because it was getting dark, but because I was hungry.

I’ll forgive the lie you told today because you were a confused child—but now you’re an adult.

— ダーク・プレイス (2015)

One reason was simply that having such a long nose was inconvenient.

Because he was a great musician.

I was shocked—not because I came in last, but because my best friend had failed!

— きっと、うまくいく (2009)

Because I was completely absorbed in it.

— 魔女の宅急便 (1989)