後になって

later on

→ 後
phrase Rare #29,023
later on Emphasizes that something happened or became clear only after some time had passed, often with a sense of hindsight or delay.
JA: 後になって、彼の言っていたことが正しかったと気づいた。
EN: Later on, I realized that what he had said was right.

後になってあいつの本当の名前がトムだってわかったんだ

Later, I found out that his real name was Tom.

後になって役立つような本を読みなさい

Read books that will be useful to you later in life.

母が私に真実を話してくれたのは何年も後になってであった

It was many years later that my mother finally told me the truth.

ずっと後になってから

It wasn't until much later.

— ザ・マン・フロム・アース (2007)