I dont know about this group but I will say that it must be a minority. I have worked for several Japanese companies {including JVC and Daiken labs} and never have I observed any antisemitism. I can say that the majority of Japanese have never given me the impression that they have any hatred for Jews. I have also heard it said that some Japanese consider themselves to be a part of the tribe, possibly one of the ten missing tribes of Israel.
It is surely possible that there are some Japanese who will try to get power by using the Jews as a scapegoat, this is typical of all the other nations.