とともに

とともに has three closely related but distinct uses, all sharing the core idea of “togetherness” or “parallelism.”

① Together with / Along with

Used to indicate two people, things, or groups acting or existing together.

📌 Often used in formal writing, reports, announcements.

② At the same time as / Simultaneously

Used to express that two actions or events occur at the same time.

📌 Often used with verbs describing actions or events.

③ As … changes / In proportion to

Used to express parallel change, similar to に連れて / に伴って, but more formal and neutral.

📌 Common in explanations of social trends or changes.