In 1934, at the age of 19, Imre Kapossy started rowing with his schoolmate Antal Szendey for Pannónia. He won a total of four Hungarian championship titles: coxed fours (1937), eights (1938), and the coxless fours and eights (both 1939). At international competitions he won the European Championship in Berlin in 1935 with the Hungarian eight. The following year, still with Pannonia’s eights, he finished in fifth at the Berlin Olympics. His last major international achievement was the silver medal at the European Championship in 1938 with the eights. He then enlisted and fought through World War II together with Szendey. In 1945, even with Szendey, he tried to return to rowing, but soon withdrew. After that, he worked as a coach for Elektromos, then FTC, and then got a job in his profession at the Budapest Electrical Factory.