By Atsushi Kobayashi (NTT Corporation) , Yutaka Hirokawa (NTT Information Sharing Laboratories) , Hiroshi Kurakami (NTT Corporation)
By Shingo Kashima (NTT Corporation) , Atsushi Kobayashi (NTT Corporation)
By Atsushi Kobayashi (NTT Corporation) , Tsuyoshi Kondoh (NTT Corporation) , Keisuke Ishibashi (NTT Corporation)