Red tricyclists are popular in Japan because of their lightweight design and their easy-to-handle handling.
But it is a safety issue that has made them an issue for pedestrians.
Last year, more than 100 pedestrians were killed in Japan by car accidents, more deaths than in the entire US.
In March, police in Tokyo arrested a man for allegedly deliberately running over pedestrians while they were crossing a street with his red tricycles.
One of the people who died in that crash was a 19-year-old man.
A Japanese police official said at the time that the police would issue an official safety warning on red trys on the same day as the incident in Tokyo.
In August, a tricycle-riding pedestrian was killed by a speeding car in Tokyo’s Ginza neighbourhood.
The man had been walking through the area when he was struck by the car, and his death was attributed to the driver’s failure to slow down.
In April, a man died in an accident with a red triceroy when he collided with a bus.