彼の死を

his death

→ 彼
phrase Rare #30,018
his death The particle を marks 「彼の死」 as the object of a verb and is usually not translated into English.
JA: 彼の死を忘れない。
EN: I won't forget his death.

我々は彼の死を残念に思う。

We are saddened by his death.

私達は彼の死を悲しんだ。

We mourned his death.

彼の死を考えると私は悲しくなる。

Thinking about his death makes me sad.

でも、もっと迅速に彼の死を望むのであれば…今ここで、そうすることができます

But if you want him dead sooner… you can make that happen right here, right now.

— 親切なクムジャさん (2005)

彼らは彼の死を聞いてとても悲しんだ。

They were very saddened to hear of his death.

その手紙を読んで彼女は彼の死を知った。

She learned of his death by reading the letter.