Shuhei Tada ran a wind-assisted 9.94 seconds in the men's 100 meter semifinals at the collegiate individual championships at Shonan BMW Stadium on Saturday.
Because of the 4.5 meter-per-second tail wind, the time was not officially recognized. Records from races with tail winds of 2 mps or more do not qualify as official records.
Yoshihide Kiryu ran 9.87 seconds (3.3 mps) in the United States in 2015 and Asuka Cambridge clocked 9.98 (5.1 mps) there in April.
Tada won the 100 final in 10.08, equaling the seventh-fastest time recorded by a Japanese and surpassing the standard needed to compete in August's IAAF World Athletics Championships. The tailwind was just inside the allowable limit at 1.9 mps.
Koji Ito set the national record of 10.00 in 1998.
