Mr. Takasu informed the Nigerian government through its embassy in Tokyo that he meant to make the donation, adding that he would fly Brazil to personally hand in the funds to the players and also watch Nigerian team's duel with Honduras played on Saturday.
After the Nigerian team was left stranded in Atlanta, USA, ahead of the Games because their flights had not been paid for, their plight made headlines.
Continually referred to as "miracle workers" by their coach, the Dream Team VI surprised many with their performance in the face of daunting challenges which included arriving barely hours to their first match in Rio.
The team however put the issues behind and eventually secured bronze. But the money troubles didn't end there.
"The $200,000 covers the bonuses and allowances as promised and the $190,000 is for the bronze medal", Takasu told BBC Sport. Takasu flew to Rio to personally deliver cheques to the team.
Nigeria also had a troubled build-up to their quarter-final against Denmark after the players boycotted a training session in a dispute over pay.
The donation, totalling $390,000, came from Takasu to boost the morale of the Nigerian players who have been bogged down by financial inadequacies.
"This team showed resilience and fought the hardest to achieve success, despite all their problems - some people would have given up but they didn't", said Takasu.
Earlier on Saturday, a former Super Eagles goalkeeper and football analyst, Peterside Idah, had raised the alarm that Nigeria Football Federation officials had hijacked the donation made by the Japanese doctor.
Pinnick added that the status of Nigeria as a sovereign nation, and the integrity of Nigeria football, is bigger than such financial gains.
"To say NFF has "hijacked" the money is outright mischief. If we get a go-ahead, it will go directly to the team", Mr. Pinnick said. Despite lofty targets set by the country's sports minister, the bronze medal won by the soccer team was the only medal recorded by the entire Olympics contingent.