Iwao Hakamada, centre, with his sister Hideko Hakamada, right, and supporters outside Tokyo High Court today as a judge ordered a retrial of his case (Picture: Kazuhiro Nogi/AFP)

An 87-year-old former boxer in Japan – believed to be the world’s longest-serving death row inmate – has been granted a retrial.

Iwao Hakamada was sentenced to death in 1968 for robbing and murdering his boss, the man’s wife and their two children.

After initially denying the crime he confessed to the killing, but later retracted the confession claiming it was coerced after a brutal police interrogation with beatings.

Despite the retraction and questions over a key piece of evidence used to convict him, the verdict was confirmed in 1980.

But today judges at Tokyo High Court ordered a retrial and Hakamada has been freed while his case is proceeded.

His lawyers left the court after a brief session and unfurled banners reading ‘retrial’ as supporters shouted ‘Free Hakamada now!’

‘I was waiting for this day for 57 years and it has come,’ said Hakamada’s sister Hideko, 90, who has campaigned on her brother’s behalf.

Hakamada in 2018 (Picture: Kazuhiro Nogi/AFP via Getty Images)

The former boxer in 2014 (Picture: Jiji Press/AFP)

‘Finally a weight has been lifted from my shoulders,’ she said.

A district court in the central city of Shizuoka first granted a retrial of Hakamada’s case in 2014, finding investigators could have planted evidence.

But Tokyo’s High Court overturned the lower court ruling four years later, and the case was sent to the Supreme Court on appeal.

There, judges ruled in 2020 that the Tokyo High Court must reconsider its decision.

One key piece of evidence used to convict him was a set of blood-stained clothes that emerged more than a year after the crime.

Supporters say the clothes did not fit him and the bloodstains were too vivid given the time elapsed.

DNA tests found no link between Hakamada, the clothes and the blood but the High Court rejected the testing methods.

National broadcaster NHK said the court’s presiding judge Fumio Daizen cast doubt on the credibility of the clothes as evidence.

Hakamada’s sister, Hideko, 90, said she had been waiting 57 years for this day (Picture: Kazuhiro Nogi/AFP)

‘There is no evidence other than the clothes that could determine Mr Hakamada was the perpetrator, so it is clear that reasonable doubt arises,’ NHK quoted him as saying.

Japan is the only major industrialised democracy other than the United States to retain capital punishment, which is always carried out by hanging.

The death penalty still enjoys broad public support and debate on the issue is rare.

Supporters say nearly 50 years of detention, mostly in solitary confinement with the ever-present threat of execution, took a heavy toll on Hakamada’s mental health.

He told AFP in 2018 he felt he was ‘fighting a bout every day’.

His sister Hideko told a news conference later on Monday she does not talk about the trials with him.

Hakamada, pictured with his sister today, has been released from prison while the case proceeds (Picture: Kazuhiro Nogi/AFP)

‘I will only tell him to rest assured, because we got a good result,’ she said.

‘Now, I just need to make sure I can see the retrial begin.’

The process for a retrial could take years if a special appeal is filed, however, and lawyers have been protesting against this system.

The Japan Federation of Bar Associations welcomed today’s ruling but said in a statement it ‘strongly demands prosecutors swiftly start the retrial process without issuing a special appeal to the Supreme Court’.

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‘We cannot afford any further delay to remedy Mr Hakamada, who has an advanced age of 87 and suffers mental and physical conditions after 47 years of physical restraint,’ association head Motoji Kobayashi said.

Rights group Amnesty International also welcomed the decision as a ‘long-overdue chance to deliver some justice’.

‘Hakamada’s conviction was based on a forced “confession” and there are serious doubts about the other evidence used against him,’ said Hideaki Nakagawa, director of Amnesty International Japan.

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The former boxer says he is innocent and only confessed to murder because of a brutal police interrogation .