に伴って details
write + accompanying N
kaku ni tomonatte
accompanying N; as N happens or proceeds, so does the other
台風の接近に伴って、電車のダイヤが乱れ始めた。
taifuu no sekkin ni tomonatte, densha no daiya ga midarehajimeta.
As the typhoon approached, the train schedules began to fall into disarray. neutral
円安の進行に伴って、輸入品の値段が上がり続けている。
en'yasu no shinkou ni tomonatte, yunyuuhin no nedan ga agaritsuzukete iru.
As the yen's depreciation progresses, the price of imported goods keeps rising. neutral
- dictionary form
- noun
- formal
- adnominal
Examples
accompanying N; as N happens or proceeds, so does the other — covers a single linked event as well as a gradual change
台風の接近に伴って、電車のダイヤが乱れ始めた。
taifuu no sekkin ni tomonatte, densha no daiya ga midarehajimeta.
As the typhoon approached, the train schedules began to fall into disarray. neutral
円安の進行に伴って、輸入品の値段が上がり続けている。
en'yasu no shinkou ni tomonatte, yunyuuhin no nedan ga agaritsuzukete iru.
As the yen's depreciation progresses, the price of imported goods keeps rising. neutral
少子化の進行に伴い、学校の統廃合が各地で進められている。
shoushika no shinkou ni tomonai, gakkou no touhaigou ga kakuchi de susumerarete iru.
As the declining birthrate progresses, the consolidation of schools is proceeding in many regions. formal
Formation
{N}にともなってattaches to noun{V}にともなってattaches to dictionary form
Variant notes
- に伴い — て-drop — written narration, news, and official documents; sits naturally before another clause without て (少子化に伴い、対策が急がれている).
- に伴う — sits directly before a noun, not mid-clause — 台風に伴う交通の乱れ "traffic disruption accompanying the typhoon"; に伴って cannot sit in that slot.
Related patterns
Similar
Both render "as X, so Y," but につれて demands a GRADUAL, causally linked proportional change on both sides, while に伴って also covers a single accompanying event with no gradient at all (地震に伴って津波が発生した — the earthquake and the tsunami are not a gradient) — に伴って also skews more formal and written (news reports, official notices) than につれて's more neutral everyday use.
とともに's "as X, so Y" reading and に伴って largely overlap, but とともに also covers flat ACCOMPANIMENT with no change on either side at all (家族とともに暮らす — no change is implied), which に伴って cannot express (？家族に伴って暮らす is odd) — に伴って is restricted to a linked change or event and skews toward formal reportage more than とともに does.