開店した

opened for business

→ 開店
phrase Rare #24,336
opened for business Used when a shop or restaurant has opened. The examples also show related forms: 開店してる means “is open,” 開店する means “will open,” and 開店します means “will open” or “I’ll open.”
JA: そのカフェは朝八時に開店した。
EN: That café opened for business at 8 a.m.

食堂ってもう開店した

Has the cafeteria opened yet?

いつ開店した

When did you open?

その新しいスーパーは先月開店した

That new supermarket opened last month.

あれは先週開店した新しい店だ

That's the new store that opened last week.