godan verb (-u), intransitive verb
accompany; go with; be consequent upon
Intransitive use, typically with 〜に. Describes something occurring together with or as a result of something else.
高齢化に伴う医療費の増加が問題になっている。
The increase in medical costs accompanying the aging population has become a problem.
地震に伴って津波が発生した。
A tsunami occurred as a consequence of the earthquake.
godan verb (-u), transitive verb
be accompanied by; bring with; involve
Transitive use, typically with 〜を. Indicates that something entails, involves, or brings something else along.
この仕事は危険を伴う。
This job involves danger.
改革には痛みを伴う。
Reform brings pain with it.