Iwao Hakamada, 87, was convicted of four murders in 1968 but granted ‘temporary release’ in 2014 after new evidence emerged

A court in Japan has granted a retrial to a man – thought to be the world’s longest-serving death row inmate – who was sentenced to hang for the murders of a family of four almost six decades ago.

The Tokyo high court ruled on Monday that Iwao Hakamada, 87, should be tried again for the crimes in a decision campaigners said was a “step towards justice”.