Many Japanese believe the two bear some responsibility for traveling to the region despite public warnings by the Japanese government about the risks of citizens traveling there . An ISIS supporter 's video suggests a Japanese hostage has been killed . Akira Sato - Yamaguchi : A more assertive leader would expose Japan to more danger .
An ISIS supporter 's video suggests a Japanese hostage has been killed . Akira Sato - Yamaguchi : A more assertive leader would expose Japan to more danger .