Abdul Hakim Sani Brown (サニブラウン・アブデル・ハキーム, Saniburaun Abuderu Hakīmu, March 6, 1999) is a Japanese athlete specialising in sprinting events. Sani Brown has a Ghanaian father and a Japanese mother. Sani Brown won the 100 metres at the 2015 World Youth Championships in Athletics setting a championship record of 10.28 (−0.4) in the final.
Sani Brown finished as runner up at the 2015 Japanese senior National Championships in both the 100m and the 200m, but did not run a qualifying time for the world championships in either event. His 200m personal best was 20.56. At the 2015 World Youth Championships in Athletics Sani Brown equalled his personal best of 10.30 in the 100m heats to set a new championship record before running 10.28 into a -0.3 headwind to improve that mark in the final. Three days later he doubled by winning the 200 metres in 20.34 into a -0.7 headwind. The time was .16 faster than the championship qualifying standard, thereby punching Sani Brown's ticket to the world championships as a sixteen year old.
At the 2015 World Championships Sani Brown qualified for the semi-final round against athletes who were at least three years his senior.
In Japan, Sani Brown ran for Josai High School, a private high school operated by the same corporation that operates Josai University in the Toshima ward of Tokyo. In 2016, he committed to the University of Florida.