Abstract
The Hayabusa 2 mission, an asteroid exploration rendezvousing at a C-type near-Earth asteroid 1999 JU3, dropping off an explosively formed impactor colliding the surface to excavate a crater, and retrieving samples of the surface to the earth, is now developing the spacecraft and payload instruments aiming at a proposed launch in December 2014. I will discuss scientific strategy according to characterization of surface condition of the asteroid, analyses of retrieved samples, modeling of the origin and evolution of C-type asteroids.