By Kazunori Kamiya (NTT Corporation) , Hiroshi Kurakami (NTT Corporation)
By Hiroshi Asakura (NTT Corporation) , Kensuke Nakata (NTT Corporation) , Shingo Kashima (NTT Corporation) , Hiroshi Kurakami (NTT Corporation)
By Atsushi Kobayashi (NTT Corporation) , Yutaka Hirokawa (NTT Information Sharing Laboratories) , Hiroshi Kurakami (NTT Corporation)