Alright this one is simple. This one can be done on the same event 75 times.
Just go to options on the main menu and gameplay. Then select hard and remember to save! Do not just back out or it will not stay on hard. What i did was go to drifting and select Drifters Smokem Tour, then select the miyatomi track, and did it 75 times. U have to make 1st place for it to count. Even an amatuer drifter can make 1st on this every time with some practice first. Get a pen and paper and keep tally, do to the fact there is no way to keep track of how many you have. If you absolutey suck at drifting, just pick any level you can do, and do it over and over again.