If the attempt is successful it is expected that "Hayabusa-2" will return to the Earth in 2020.
The search engine will try to land on the surface of the asteroid, and then a tantalum throw will be thrown to the floor to lift and collect the dust that is charged.
The whole landing effort will be very tight. Spacecraft rarely touches the surface during attempts to collect samples.
The "Dark" asteroid diameter is slightly less than a kilometer, and its density is so that only the sixty-five thirty of the Earth's gravitational attraction is the power of a gravitational attraction.
Therefore, the material raised from extinguishing the spray shaft should be about one meter and one in height and allow the Sampler tool to collect samples.