I couldn't either, but on the Wikipedia page[1] for Hayabusa-2, there is a gif of the flight path. Maybe it took 3.5 years to achieve proper alignment/speed to land on the asteroid, but due to the larger size of earth and the position of Hayabusa-2 when it begins its return, it will be much more straightforward?
[1] https://en.wikipedia.org/wiki/Hayabusa2