The Metropolitan Police Department dispatched up to about 26,000 police officers, including those sent by other prefectural police forces for assistance, to guard Sunday's parade of the Emperor and Empress.
The MPD said there were no instances of the kinds of trouble that had been feared, such as unauthorized drone flights.
Along the parade route, 40 checkpoints for examining spectators' belongings were set up in 29 locations. The police had been conducting the checks using metal detectors and other devices since Sunday morning.
People who wanted to see the parade were instructed by police officers to open their bags and other belongings for inspection. Those who had items that were prohibited to bring into spectator areas, such as cans, bottles and lighters, disposed of them in prepared garbage bags.
Along the course for the royal parade, police officers formed long lines facing toward spectators to watch for suspicious activity. Additional armed special police officers were also positioned near the route to provide a counter-terrorist layer of security.
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