the top four athletes in each quarterfinal heat advanced to the semifinals. The semifinals featured 2 heats of 8 runners each. The top four runners in each semifinal heat advanced, making an eight-man final. Records Prior to the competition, the existing World and Olympic records were as follows. No records were set during this event. Schedule All times are Japan Standard Time (UTC+9) Results First round The top four runners in each of the 7 heats advanced. Heat 1 Heat 2 Heat 3 Heat 4 Heat 5 Heat 6 Heat 7 Quarterfinals The four fastest runners in each of the four heats advanced to the semifinals. Quarterfinal 1 Quarterfinal 2 Quarterfinal 3 Quarterfinal 4 Semifinals The top four runners in each of the two semifinals advanced to the final. Semifinal 1 Semifinal 2 Final References Athletics at the 1964 Summer Olympics 400 metres at the Olympics Men's events at the 1964 Summer Olympics