に伴(ともな)ってAs, Due, Along with, Hand-in-hand with, Resulted in, Be consequent upon

に伴って・に伴い describes changes in one thing due to another, in a proportional or cause-and-effect manner, as in 人口減少に伴って (along with the declining population). にしたがって can overlap in this usage, but it also extends to a broader sense of following rules or standards, as in 指示に従って (according to instructions).

に伴って・に伴い and と共に both express things happening in connection with another event. と共に emphasizes simultaneity or shared experience, e.g. '成長と共に責任も増える' ('Responsibility grows along with maturity'). に伴って・に伴い emphasizes causality or consequential change, often in formal contexts, e.g. '経済の発展に伴って生活水準が向上した' ('As the economy developed, living standards improved').

に沿って and に伴って・に伴い both imply corresponding relationships, but with different nuances. に沿って means in line with in literal or figurative contexts, as in 点線に沿って (along the dotted line) or スケジュールに沿って (in line with the schedule). に伴って・に伴い suggests one change occurring along with another, as in 人口減少に伴って (along with the declining population).

Both can describe one event influencing another, but with very different nuance. きっかけ refers to something that triggered or led to a change, as in 入院をきっかけにタバコをやめた (I gave up smoking on the occasion of my hospitalization). に伴って・に伴い is more formal, often expressing a broader causal relationship, as in 高齢化に伴い人口が激減した (The population rapidly declined along with the aging of the population).

Both are formal expressions describing one event influencing another, but differ slightly in usage. を契機に emphasizes a turning point or opportunity that led to change, as in 入院を契機にタバコをやめた (I gave up smoking on the occasion of my hospitalization). に伴って・に伴い often appears in news reports to describe cause-and-effect relationships.

Both に伴って and と並んで connect two elements, but differ in meaning. に伴って expresses a causal or accompanying relationship where one thing changes in response to another, e.g. '経済の成長に伴って、生活水準も上がった' ('As the economy grew, the standard of living also rose'). と並んで indicates comparable qualities without implying cause, e.g. 'ドラえもんと並んで人気のアニメ' ('an anime as popular as Doraemon').

につれて and に伴って・に伴い both express one thing happening as a result of or alongside another. につれて emphasizes gradual and proportional change, e.g. '年を取るにつれて体力が落ちる' ('As I age, my stamina declines'). に伴って・に伴い can also be used with one-time or habitual events, e.g. '津波は地震に伴い発生する' ('Tsunamis occur together with earthquakes').