Lucie Riu, JAXA Japan Aerospace Exploration Agency, Sagamihara, Japan, Tomoki Nakamura, Tohoku University, Sendai, Japan, Kohei Kitazato, The University of Aizu, Aizu-Wakamatsu, Japan, Cedric Pilorget, IAS Institut d'Astrophysique Spatiale, Orsay Cedex, France, Moe Matsuoka, ISAS/JAXA, Sagamihara, Japan, Eri Tatsumi, University of Tokyo, Tokyo, Japan, Chiho Sugimoto, The University of Tokyo, Tokyo, Japan and Seiji Sugita, University of Tokyo, Bunkyo-ku, Japan