この手紙は君宛てです。

この手紙は君宛てです。

This letter is addressed to you.

この手紙(てがみ)は君宛(きみあ)てです。

Kono tegami wa kimiate desu.

此の (この)

this (something or someone close to the speaker (including the speaker), or ideas expressed by the speaker)

手紙 (てがみ)

letter

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

です (です)

be; is

Readings: シュ、ズ、て、て-、 -て、た-

Meaning: hand

Readings: シ、かみ

Meaning: paper

Readings: クン、きみ、 -ぎみ

Meanings: mister, you, ruler, male name suffix

Readings: エン、あ.てる、 -あて、 -づつ、あたか.も

Meanings: address, just like, fortunately