Later in 1952, he became a champion in 100-metre freestyle in West Bengal. The sports lovers in the then Pakistan saw an emerging star in the sports arena when Brojen became champion in 100m, 200m, 400mand 1500m freestyle in 1953 in East Pakistan. He also became the Pakistanchampion in 100m and 200m freestyle, in 1955. In the same year, he becamea champion in 100, 200 and 400 yards of freestyle in the Pakistan inter-universitycompetition.
Brojen, who developed himself into a swimmer ofinternational repute by practising in the nearby river in his village homein his earlylife, accomplished with credit 12 miles and 26 miles swim inDhaka swimmingpooland also completed non-stop 48 hours swimming.
In international swimming competitions, Brojen Das earned credit by swimming 33 kms in Italy, secured the first position inthe 23-nation Bili Batlelans Channel swimming competition and became thefirst Asian to cross the English Channel in 1958.
Not only did he cross the English Channel in record time, he crossed it six times and created two world records on the same day. Earlier in 1959, he succeeded in three long-distance international swimming competitions.
Brojen Das, who was respectfully regarded as "Brojenda" by his near and dear ones, got the "pride of performance" award in 1959 from the Pakistan government and earned the trophy of "king of channel" from the Channel Swimming Association of the United Kingdom in 1986. Bangladesh government gave him the national award in 1976 for his valuable contribution in thefield of sports and games.
Brojen Das became a life-member of Channel Swimming Association (UK), vice-president of World Long Distance Swimming Association, secretary general of Bangladesh Swimming Federation, life-member of Royal Life Saving Society, president of Finlay Swimming Club (UK), life-memberof Indian Life Saving Society and Central Swimming Club of India and Honorary life member of Dhaka University Club.