Japan needs to increase security as Group of Seven officials visit, the country's prime minister said Sunday, a day after an explosive was thrown at him during a campaign event.
Prime Minister Fumio Kishida escaped unharmed after the device, reportedly a pipe bomb, was thrown towards him as he campaigned in the western city of Wakayama on Saturday.
A 24-year-old man was arrested, but has so far revealed nothing about his motives in the attack, which came as Japan hosts two G7 ministerial meetings.
"At a time when high-ranking officials from all over the world are visiting... Japan as a whole needs to maximize its efforts to ensure security and safety," Kishida told reporters on Sunday.
"It's unforgivable such a violent act was committed during an election campaign," AFP quoted him as saying.
He said he expected police to step up security measures in the wake of the incident, which came less than a year after Japan's former prime minister Shinzo Abe was assassinated by a gunman in the western city of Nara.
