Relative time expressions in Japanese language precede the rest of the sentence.1 They are used without any additional modification and can simply be used as-is.2
Example: Tomorrow I will eat cake
ζζ₯γ±γΌγγι£γΉγ
Info
ζζ₯ (tomorrow) is the relative time expression. It indicates that the following is to take place in the future at this time.
γ±γΌγ (cake) is the γ marked object.
γ is not present/visible, so the core subject is assumed to be γγγ (I).
ι£γΉγ (will eat) is the verb.
