Unfortunately in 2005, on the day before the race, during a 1.0 miles speed run, Inada drove the car off course after not noticing the finishing line (which was a set of cones), misreading co driver Susumu Koyama's (owner of tuner, JUN Auto) signal to slow down, and failing to slow down before a corner 2 km after the finishing line, causing mechanical damages to the car and putting the co-driver in hospital for whiplash injuries.