A steady stream of mourners on Saturday visited the scene of former Japanese Prime Minister Shinzo Abe's assassination in the western city of Nara, Reuters reported.

Japan's longest serving modern leader was gunned down while making a campaign speech on Friday morning by a 41-year-old man.

A night vigil will be held on Monday, with Abe's funeral to take place on Tuesday, attended by close friends, Japanese media said. There was no immediate word on any public memorial service.

The funeral will take place in Abe's hometown of Shimonoseki in Yamaguchi Prefecture.