Originally Posted by soletuti

イタチは暗部にスパイの為に入ったが里側に情報を流した二重スパイだった
Itachi was a spy (from Uchiha) to ANBU, but he leaked (Uchiha’s) information to the village side. He was a double spy.

イタチは４才で戦争を経験しているから里の安定を第一に考えていた
Itachi experienced a war at his age 4, so he thought the village’s safety was the most important.

だから仕方なくうちは抹殺をした
So he killed Uchiha clan. He had no choice.

三代目は和解をしようとしたが間に合わずあの夜へと
The third Hokage tried to reconcile, but it was late. And the night came.

抜け忍になるのも指令の一つだった
To be a rogue Ninja was a part of the order.

だがイタチは一つ失敗をした
But Itachi made one mistake.

弟を殺せなかった
He couldn’t kill his brother.

サスケをまもるように三代目に頼みサスケに手を出さないようダンゾウを脅して里を抜けた
He asked the third to protect Sasuke and threatened Danzou not to lay a hand on Sasuke and he left village.

イタチは初めからサスケに力を与え死ぬつもりだったらしい
Itachi planed to give his power to Sasuke and die from the from the very beginning.