君次第だよ。

君次第だよ。

It's up to you.

君(きみ)次第(しだい)だよ。

Kimi shidai da yo.

君 (きみ)

you; buddy; pal; monarch; ruler; sovereign; (one's) master

次第 (しだい)

dependent upon; as soon as; immediately (upon); circumstances; order; precedence; program; programme; agenda

だ (だ)

be; is; indicates past or completed action; indicates light imperative

よ (よ)

indicates certainty, emphasis, contempt, request, etc.; used when calling out to someone; used to catch one's breath or get someone's attention; yo!

Readings: クン、きみ、 -ぎみ

Meanings: mister, you, ruler, male name suffix

Readings: ジ、シ、つ.ぐ、つぎ

Meanings: next, order, sequence

Readings: ダイ、テイ

Meanings: No., residence