"I was able to keep a cool head and put the penalty away", said Kagawa.
The former Aston Villa midfielder was dismissed after just four minutes in the Group H opener for deliberate handball and Shinji Kagawa made no mistake with the resulting penalty.
Sanchez became the first player to be red-carded in this year's World Cup and will surely be suspended for his actions.
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For West Indies , only opener Devon Smith and wicketkeeper Shane Dowrich posted scores of substance, 61 and 55 respectively.
James Rodriguez - who finished the 2014 tournament as top scorer - was left out of Colombia's starting XI due to a muscle injury and the South American side quickly found themselves facing an uphill task. The Asian side limped into the World Cup, losing friendlies to Ukraine, Ghana and Switzerland before topping Paraguay in the final tune-up.
The fastest-ever though still remains Jose Batista, who was sent off inside the first minute for fouling Gordon Strachan in 1986 World Cup match between Scotland and Uruguay.
The 29-year old was a key player in Japan's qualification run scoring six goals and will have to be at his best against the South Americans if Japan has a chance of getting out of Group H.
Yuya Osako's 73rd-minute victor was a huge relief for the Japanese, who were thumped 4-1 by Colombia four years ago during a miserable campaign in which they failed to register a single win.
The referee had no hesitation in showing a straight red to the Colombia midfielder and, from the resultant penalty, Kagawa kept his goal in stroking a shot straight down the middle.
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State media in both Saudi Arabia and the United Arab Emirates did not immediately acknowledge the assault. The sound of heavy, sustained gunfire clearly could be heard in the background.
But the game exploded into life after three minutes when the same player got clear down the middle and, when Ospina saved his strike, Kagawa's follow-up was blocked by the arm of Sanchez.
For Colombia, a team who reached the quarter-finals in 2014, this was a miserable defeat that leaves them with two very important games against Poland and Senegal to come.
But a brilliant free kick has Los Cafeteros level.
Osako with the all-important goal for Japan...
With just three minutes on the clock, Colombia were forced to play the majority of the match with ten men, and it cost them dearly.
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Footage of the crash showed four bodies on the ground, the charred Chevrolet and several Border Patrol vehicles at the scene. Six people were taken to a San Antonio hospital, and four others went to a local hospital in Dimmit County.
It's impossible to forget Colombia forward James Rodriguez's unbelievable run in the 2014 World Cup.
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