M. Suganuma (1), Y. Kobayashi (1), N. Okada (1), Y. Yoshii (2), T.
  Minezaki (2), T. Aoki (2), K. Enya (3), H. Tomita (2), and S. Koshida (2)
  ((1) National Astronomical Observatory of Japan, (2) University of Tokyo, (3)
  Japan Aerospace Exploration Agency)