TOKYO — A Japanese court has sentenced the killer of Shinzo Abe to life in prison, three and a half years after he shot the former prime minister at a political rally.

Tetsuya Yamagami, 45, had pleaded guilty to killing Abe in July 2022 as he was making an election campaign speech in the western city of Nara.

Abe, Japan’s longest-serving prime minister who left a lasting influence on the country’s politics, died of injuries sustained after Yamagami shot him from behind with a homemade weapon.

Prosecutors said Yamagami deserved life imprisonment for his "grave act". Abe's assassination stunned the country, where there is virtually no gun crime.

Seeking leniency, Yamagami's defense team said he was a victim of "religious abuse".

His mother's devotion to the Unification Church bankrupted the family, and Yamagami bore a grudge against Abe after realizing the ex-leader's ties to the controversial church, the court heard.

On Wednesday, Judge Shinichi Tanaka from the Nara district court said the fact that Yamagami "shot [Abe] from behind... when he was least expecting it" showed how "despicable and extremely malicious" his actions were, the AFP news agency reported.

Yamagami sat quietly with his hands clasped and eyes downcast as the sentence was handed down. Nearly 700 people had lined up outside the courtroom to attend the hearing.

Abe's shocking death in broad daylight prompted investigations into the Unification Church and its questionable practices, including soliciting financially ruinous donations from its followers.

The case also exposed links with politicians from Japan's ruling Liberal Democratic Party and resulted in the resignations of several cabinet ministers.

Journalist Eito Suzuki, who covered all but one of Yamagami's court hearings, said Yamagami and his family seemed "overwhelmed with despair" throughout the trial.

Yamagami "exuded a sense of world-weariness and resignation", recounts Suzuki, who began looking into the Unification Church long before Abe's shocking murder.

"Everything is true. There is no doubt that I did this," Yamagami said solemnly on the first day of his trial in October 2025.

Yamagami's lawyers argued that he resented the church because his mother donated to it his late father's life insurance and other assets, amounting to 100 million yen ($633,000; £471,000).

Yamagami spoke of his grievance against Abe, who was 67 when shot, after seeing his video message at a church-related event in 2021, but said he had initially planned to attack church executives, not Abe.

In an emotional statement read to the court, Abe's widow Akie said the sorrow of losing her husband "will never be relieved".

"I just wanted him to stay alive," she had said.

Founded in South Korea, the Unification Church entered Japan in the 1960s and cultivated ties with politicians to grow its following, researchers say.

While not a member, Abe, like several other Japanese politicians, would occasionally appear at church-related events. His grandfather Nobusuke Kishi, also a former PM, was said to have been close to the group because of its anti-communist stance.

In March last year, a Tokyo court revoked the church's status as a religious corporation, ruling that it coerced followers into buying expensive items by exploiting fears about their spiritual well-being.

The church has also drawn controversy for holding mass wedding ceremonies involving thousands of couples.

Yamagami's sister, who appeared as a defense witness during his trial, gave a tearful testimony on the "dire circumstances she and her siblings endured" because of their mother's deep involvement with the church, Suzuki said.

"It was an intensely emotional moment. Nearly everyone in the public gallery appeared to be crying," he said.

But prosecutors argue there is "a leap in logic" as to why Yamagami directed his resentment of the church at Abe. During the trial, the judges also raised questions suggesting they found it hard to understand this aspect of his defense.— Agencies