First Author:   Toshiji Kawagoe Future University Hakodate kawagoe@fun.ac.jp   116-2 Kamedanakano-cho, Hakodate Hokkaido, 041-8655, Japan   +81-138-34-6424(Phone) +81-138-34-6424(Fax) Second Author: Hirokazu Takizawa Chuo University takizawa@nna.so-net.ne.jp