In Japanese, the verbs naru なる and suru する form an ergative verb pair of eventivizers: they're eventive verbs used with the adverbial form of statives, such as adjectives, stative verbs, and habitual predicates, in order to make said stative to behave like an eventive.

Notably, Japanese statives in nonpast form lack a future tense, so either a futurate or an eventivizer will be necessary to express a state is true in the future.

musuko ga isha da

息子が医者だ

[My] son is a doctor. (present tense.)

* [My] son will be a doctor . (can't mean the future tense.)

息子が医者だ [My] son is a doctor. (present tense.) * . (can't mean the future tense.) musuko ga isha ni naru

息子が医者に なる

[My] son will be a doctor.

息子が医者に [My] son be a doctor. watashi ga musuko wo isha ni suru

私が息子を医者にする

I will make [my] son be a doctor.

Note: naru and suru have other functions, but this article won't focus on them.