kabe ni ana ga arimasu.

subject particle

Breakdown of kabe ni ana ga arimasu.

• に: indirect object particle
• ある: to exist
• 壁かべ: wall

Questions & Answers about kabe ni ana ga arimasu.

What does に after 壁 do here?

に marks the location where something exists.

So in 壁に穴があります, 壁に means in/on the wall as the place where the hole exists.

A useful pattern is:

• place に thing が あります
• There is/are [thing] in/at/on [place].

Examples:

• 机に本があります。 — There is a book on the desk.
• 公園に木があります。 — There is a tree in the park.

In this sentence, the wall is the location, not the thing being described as doing an action.

Why is 穴 followed by が?

が marks the thing that exists.

In 壁に穴があります, the sentence is structurally:

• 壁に = in the wall
• 穴が = a hole
• あります = exists / there is

So が tells you that 穴 is the thing being newly presented or identified.

This is very common with あります and います:

• 部屋に猫がいます。 — There is a cat in the room.
• 箱にお菓子があります。 — There are sweets in the box.

Using が here sounds natural because you are pointing out the existence of a hole.

Why is it あります and not います?