The fatal shooting of former Prime Minister Shinzo Abe continues to ripple through Japan a month on, with many returning to the site of the attack Monday to pay their respects and investigators working to unravel the motive of the assailant.

In the western city of Nara, flowers were placed at the traffic island near the train station where Abe was shot at close range during a campaign speech on July 8, with commuters also stopping to offer prayers.

"I cannot find words," a woman in her 50s said, while a man in his 50s praised the former prime minister as a man who changed Japan, criticizing the inadequate security measures at the time of the speech.