Later in the mission, the spacecraft itself will land on the asteroid after it has blown a small crater of explosives so that under the surface of the object, samples may be collected that were not exposed to space.
Japanese scientists are currently racing NASA for this historic achievement. The US agency is expected to return to Earth in 2023. Hayabusa-2 is expected to return in 2020.
Under its bleak surface, it is believed that asteroids billions of years ago contain a wealth of information about the formation of the solar system.
"By exploring a C-type asteroid rich in water and organic materials, we will clarify the interactions between the building blocks of the Earth and the evolution of their oceans and their lives, thus developing the science of the solar system", said JAXA.
Despite years of planning, Ryugu's diamond form surprised the team as the mission approached the asteroid.
"From a distance, Ryugu first appeared round, then gradually became a square before receiving a beautiful, fluorite-like shape ̵
That said, the team has already achieved a mighty feat by putting the 900-meter-wide rock – something it describes as equivalent – a 6-centimeter (2.4-inch) target at 20,000 kilometers (12,400 miles) away hold true.
"In other words, reaching Ryugu is the same for a 6-centimeter goal in Brazil from Japan," the agency said.
CNN's Yoko Wakatsuki and Junko Ogura reported on the coverage.