Soejima during the 2009 Boston Marathon
|Track and field (athletics)|
|2004 Athens||4x400m - T53-54|
Masazumi was the men's wheelchair winner of the 2011 New York Marathon and the 2011 Boston Marathon. He has competed in the marathon in both the 2004 and 2008 Summer Paralympics, 10000m in 2004, 5000m and 1500m in 2008 but it was as part of the Japanese 4x400m relay in 2004 that he won his only medal, a bronze.
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