The incident exposes vulnerabilities in Japan's security system and a failure to institute changes following the killing of former prime minister Shinzo Abe during an election campaign last year, four experts interviewed by Reuters said. Fukuda said for such big, international events, authorities are able to provide solid security by mobilising a huge police presence. The government has instructed authorities to strengthen security measures and to ensure safety precautions at gatherings of VIPs, he added. read moreIn Saturday's attack, the suspect was about 10 metres from Kishida, according to media reports. He said it showed that a review of security plans by the National Police Agency could only go so far.

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