apuri ga kidoushita.

subject particle

Breakdown of apuri ga kidoushita.

• アプリ: app
• 起動きどうする: to start up; boot

Questions & Answers about apuri ga kidoushita.

What does アプリ mean? Is it the same as アプリケーション?

Yes. アプリ is the shortened everyday form of アプリケーション, which comes from English application.

In modern Japanese, アプリ is the normal word for an app, especially on phones, tablets, and computers. The full form アプリケーション sounds more formal or technical.

Why is が used after アプリ?

Here, が marks アプリ as the subject of the sentence.

So the basic structure is:

• アプリ = app
• が = subject marker
• 起動した = started up / launched

The idea is that the app is the thing that underwent the action or change of state. In other words, the app is what started up.

What exactly does 起動した mean grammatically?

起動した is the plain past form of 起動する.

Breakdown:

• 起動 = startup, activation
• する = to do
• 起動する = to start up, to launch
• 起動した = started up / launched

This is a very common noun + する pattern in Japanese. These are often called する-verbs.