Even on a brief Google search, I cannot find out who this Andrew Clements you're talking about it. He's apparently absolutely nobody.
But its worth noting that copyright law is DIFFERENT in Europe and North America to japan. We have the Fair Use doctrine which allows some use of IP so long as its transformative in nature.
If this Andrew Clements guy is in those areas, he may be covered by Fair Use, because its his local law which will apply to him, not Japanese.
But you don't sday who he is, or what he's doing, so we have no information to go by.