To empathize; to put oneself in someone else's (or a character's) emotional position and share their feelings.
小説の登場人物に感情移入して、最後の場面で思わず泣いてしまった。
I empathized with the novel's character and unexpectedly cried at the final scene.
彼女は演技が上手で、観客が感情移入しやすい。
She is a good actress, so the audience can easily empathize (with her characters).
ゲーム制作では、プレイヤーが感情移入できる設定や演出が重要だ。
In game development, settings and direction that allow players to empathize are important.