γ‚’ is a particle that marks a noun as the object that an action is being performed upon.1

Example: I eat cake

γ‚±γƒΌγ‚­γ‚’γŸγΉγ‚‹

Info

In this example, γ‚±γƒΌγ‚­ (cake) is marked by the γ‚’ particle, indicating that it is the object that something is being done to.

The context of the action being performed is provided by the verb γŸγΉγ‚‹ (eat).

The subject of the sentence is inferred from context to be γ‚γŸγ— (I), as the が particle is invisible/omitted.

Footnotes

  1. Japanese from Scratch (2) ↩